[css-color] Consistent use of "color component" rather than "color channel" (both were used). See whatwg/html#11014

Author: svgeesus

css-color-4/Overview.bs

@@ -859,7 +859,7 @@ Representing Colors: the <<color>> type</h2>
 	Colors in CSS are represented as a list of color components,
 	also sometimes called “channels”,
 	representing axises in the color space.
-	Each channel has a minimum and maximum value,
+	Each component has a minimum and maximum value,
 	and can take any value between those two.
 	Additionally, every color is accompanied by
 	an <dfn lt="alpha channel | alpha component" export>alpha component</dfn>,
@@ -868,7 +868,7 @@ Representing Colors: the <<color>> type</h2>
 
 	CSS has several syntaxes for specifying color values:
 	* the sRGB [=hex color notation=]
-		which represents the RGB and alpha channels in hexadecimal notation
+		which represents the RGB and alpha components in hexadecimal notation
 	* the various [=color functions=]
 		which can represent colors using a variety of color spaces and coordinate systems
 	* the constant [=named color=] keywords
@@ -877,7 +877,7 @@ Representing Colors: the <<color>> type</h2>
 	The <dfn>color functions</dfn>
 	use CSS [=functional notation=]
 	to represent colors in a variety of [=color spaces=]
-	by specifying their channel coordinates.
+	by specifying their component coordinates.
 	Some of these use a <dfn export>cylindrical polar color</dfn> model,
 	specifying color by a <<hue>> angle,
 	a central axis representing lightness
@@ -891,7 +891,7 @@ Representing Colors: the <<color>> type</h2>
 	The [=color functions=] available in Level 4 are
 	* ''rgb()'' and its ''rgba()'' alias,
 		which (like the [=hex color notation=]) specify sRGB colors directly
-		by their red/green/blue/alpha channels.
+		by their red/green/blue/alpha components.
 	* ''hsl()'' and its ''hsla()'' alias,
 		which specify sRGB colors
 		by hue, saturation, and lightness
@@ -1281,7 +1281,7 @@ sRGB Colors</h2>
 The RGB functions: ''rgb()'' and ''rgba()''</h3>
 
 	The ''rgb()'' and ''rgba()'' functions define an sRGB color
-	by specifying the r, g and b (red, green, and blue) channels directly.
+	by specifying the r, g and b (red, green, and blue) components directly.
 	Their syntax is:
 
 	<pre class='prod'>
@@ -1330,15 +1330,15 @@ The RGB functions: ''rgb()'' and ''rgba()''</h3>
 	</wpt>
 
 	The first three arguments specify the r, g and b (red, green, and blue)
-	channels of the color, respectively.
-	''0%'' represents the minimum value for that color channel in the sRGB gamut,
+	components of the color, respectively.
+	''0%'' represents the minimum value for that color component in the sRGB gamut,
 	and ''100%'' represents the maximum value.
 
-	The percentage reference range of the color channels comes from the historical fact that
-	many graphics engines stored the color channels internally as a single byte,
+	The percentage reference range of the color components comes from the historical fact that
+	many graphics engines stored the color components internally as a single byte,
 	which can hold integers between 0 and 255.
-	Implementations should honor the precision of the channel as authored or calculated wherever possible.
-	If this is not possible, the channel should be <a href="https://drafts.csswg.org/css-values-4/#combine-integers">rounded towards +∞</a>.
+	Implementations should honor the precision of the component as authored or calculated wherever possible.
+	If this is not possible, the component should be <a href="https://drafts.csswg.org/css-values-4/#combine-integers">rounded towards +∞</a>.
 
 	The final argument, the <<alpha-value>>, specifies the alpha of the color.
 	If omitted, it defaults to ''100%''.
@@ -1372,7 +1372,7 @@ The RGB functions: ''rgb()'' and ''rgba()''</h3>
 The RGB Hexadecimal Notations: ''#RRGGBB''</h3>
 
 	The CSS <dfn lt="hex color | hex color notation" export>hex color notation</dfn>
-	allows an sRGB color to be specified by giving the channels as hexadecimal numbers,
+	allows an sRGB color to be specified by giving the components as hexadecimal numbers,
 	which is similar to how colors are often written directly in computer code.
 	It's also shorter than writing the same color out in ''rgb()'' notation.
 
@@ -1387,13 +1387,13 @@ The RGB Hexadecimal Notations: ''#RRGGBB''</h3>
 		<dt>6 digits
 		<dd>
 			The first pair of digits, interpreted as a hexadecimal number,
-			specifies the red channel of the color,
+			specifies the red component of the color,
 			where ''00'' represents the minimum value
 			and ''ff'' (255 in decimal) represents the maximum.
 			The next pair of digits, interpreted in the same way,
-			specifies the green channel,
+			specifies the green component,
 			and the last pair specifies the blue.
-			The alpha channel of the color is fully opaque.
+			The alpha component of the color is fully opaque.
 
 			<div class='example' id="ex-hex6">
 				In other words, <span class="swatch" style="--color: #00ff00"></span>  ''#00ff00'' represents the same color as <span class="swatch" style="--color: #00ff00"></span> ''rgb(0 255 0)'' (a lime green).
@@ -1403,7 +1403,7 @@ The RGB Hexadecimal Notations: ''#RRGGBB''</h3>
 		<dd>
 			The first 6 digits are interpreted identically to the 6-digit notation.
 			The last pair of digits, interpreted as a hexadecimal number,
-			specifies the alpha channel of the color,
+			specifies the alpha component of the color,
 			where ''00'' represents a fully transparent color
 			and ''ff'' represent a fully opaque color.
 
@@ -1415,12 +1415,12 @@ The RGB Hexadecimal Notations: ''#RRGGBB''</h3>
 		<dd>
 			This is a shorter variant of the 6-digit notation.
 			The first digit, interpreted as a hexadecimal number,
-			specifies the red channel of the color,
+			specifies the red component of the color,
 			where ''0'' represents the minimum value
 			and ''f'' represents the maximum.
-			The next two digits represent the green and blue channels, respectively,
+			The next two digits represent the green and blue components, respectively,
 			in the same way.
-			The alpha channel of the color is fully opaque.
+			The alpha component of the color is fully opaque.
 
 			<div class='example' id="ex-hex3">
 				This syntax is often explained by saying that it's identical to a 6-digit notation obtained by "duplicating" all of the digits.
@@ -1435,10 +1435,10 @@ The RGB Hexadecimal Notations: ''#RRGGBB''</h3>
 			This is a shorter variant of the 8-digit notation,
 			"expanded" in the same way as the 3-digit notation is.
 			The first digit, interpreted as a hexadecimal number,
-			specifies the red channel of the color,
+			specifies the red component of the color,
 			where ''0'' represents the minimum value
 			and ''f'' represents the maximum.
-			The next three digits represent the green, blue, and alpha channels, respectively.
+			The next three digits represent the green, blue, and alpha components, respectively.
 	</dl>
 
 	<wpt>
@@ -2214,7 +2214,7 @@ HSL Colors: ''hsl()'' and ''hsla()'' functions</h2>
 		parsing/color-valid-hsl.html
 	</wpt>
 
-	The final argument specifies the alpha channel of the color.
+	The final argument specifies the alpha component of the color.
 	It's interpreted identically to the fourth argument of the ''rgb()'' function.
 	If omitted, it defaults to ''100%''.
 
@@ -2341,7 +2341,7 @@ Converting HSL Colors to sRGB</h3>
 	Converting an HSL color to sRGB is straightforward mathematically.
 	Here's a sample implementation of the conversion algorithm in JavaScript.
 	It returns an array of three numbers
-	representing the red, green, and blue channels of the colors,
+	representing the red, green, and blue components of the colors,
 	which for colors in the sRGB gamut will be in the range [0, 1].
 
 	This code assumes that <em>parse-time</em> clamping
@@ -2764,7 +2764,7 @@ HWB Colors: ''hwb()'' function</h2>
 	Achromatic HWB colors no longer contain any hint of the chosen hue.
 	In this case, the hue component is [=powerless=].
 
-	The fourth argument specifies the alpha channel of the color.
+	The fourth argument specifies the alpha component of the color.
 	It's interpreted identically to the fourth argument of the ''rgb()'' function.
 	If omitted, it defaults to ''100%''.
 
@@ -3861,7 +3861,7 @@ The Predefined sRGB Color Space: the ''sRGB'' keyword</h3>
 		<dt><dfn>srgb</dfn>
 		<dd>
 			The ''srgb'' [[!SRGB]] color space accepts three numeric parameters,
-			representing the red, green, and blue channels of the color.
+			representing the red, green, and blue components of the color.
 			In-gamut colors have all three components in the range [0, 1].
 			The whitepoint is [=D65=].
 
@@ -3937,7 +3937,7 @@ The Predefined Linear-light sRGB Color Space: the ''srgb-linear'' keyword</h3>
 			<dt><dfn>srgb-linear</dfn>
 			<dd>
 				The ''srgb-linear'' [[!SRGB]] color space accepts three numeric parameters,
-				representing the red, green, and blue channels of the color.
+				representing the red, green, and blue components of the color.
 				In-gamut colors have all three components in the range [0, 1].
 				The whitepoint is [=D65=].
 
@@ -3999,7 +3999,7 @@ The Predefined Display P3 Color Space: the ''display-p3'' keyword</h3>
 		<dt><dfn>display-p3</dfn>
 		<dd>
 			The ''display-p3'' [[!Display-P3]] color space accepts three numeric parameters,
-			representing the red, green, and blue channels of the color.
+			representing the red, green, and blue components of the color.
 			In-gamut colors have all three components in the range [0, 1].
 			It uses the same primary chromaticities as [[DCI-P3]],
 			but with a [=D65=] whitepoint, and the same transfer curve as sRGB.
@@ -4075,7 +4075,7 @@ The Predefined A98 RGB Color Space: the ''a98-rgb'' keyword</h3>
 		<dt><dfn>a98-rgb</dfn>
 		<dd>
 			The ''a98-rgb'' color space accepts three numeric parameters,
-			representing the red, green, and blue channels of the color.
+			representing the red, green, and blue components of the color.
 			In-gamut colors have all three components in the range [0, 1].
 			The transfer curve is
 			a gamma function, close to but not exactly 1/2.2.
@@ -4133,7 +4133,7 @@ The Predefined ProPhoto RGB Color Space: the ''prophoto-rgb'' keyword</h3>
 		<dt><dfn>prophoto-rgb</dfn>
 			<dd>
 				The ''prophoto-rgb'' color space accepts three numeric parameters,
-				representing the red, green, and blue channels of the color.
+				representing the red, green, and blue components of the color.
 				In-gamut colors have all three components in the range [0, 1].
 				The transfer curve is
 				a gamma function with a value of 1/1.8,
@@ -4231,7 +4231,7 @@ The Predefined ITU-R BT.2020-2 Color Space: the ''rec2020'' keyword</h3>
 		<dt><dfn>rec2020</dfn>
 		<dd>
 			The ''rec2020'' [[!Rec.2020]] color space accepts three numeric parameters,
-			representing the red, green, and blue channels of the color.
+			representing the red, green, and blue components of the color.
 			In-gamut colors have all three components in the range [0, 1],
 			("full-range", in video terminology).
 			ITU Reference 2020 is used for
@@ -4966,8 +4966,8 @@ Interpolating with Alpha</h3>
 
 		<!-- A “pre-multiplied” color
 		is written in a form
-		where the alpha channel
-		is multiplied into the color channels,
+		where the alpha component
+		is multiplied into the color components,
 		rather than being processed independently.
 		For example, a partially-transparent blue may be given as <code class=lang-css><nobr>rgba(0, 0, 255, .5)</nobr></code>,
 		which would then be expressed as <code><nobr>[0, 0, 127.5, .5]</nobr></code> in its premultiplied representation. -->
@@ -5758,7 +5758,7 @@ Resolving sRGB values</h3>
 	<a href="https://infra.spec.whatwg.org/#ascii-lowercase">ASCII lowercase</a>.
 	The computed and used value
 	is the corresponding sRGB color,
-	paired with the specified alpha channel
+	paired with the specified alpha component
 	(after clamping to [0, 1])
 	and defaulting to opaque if unspecified).
 
@@ -5789,7 +5789,7 @@ Resolving sRGB values</h3>
 
 	Otherwise, the declared, computed and used value
 	is the corresponding sRGB color,
-	paired with the specified alpha channel
+	paired with the specified alpha component
 	(after clamping to [0, 1])
 	and defaulting to opaque if unspecified).
 
@@ -5852,7 +5852,7 @@ Resolving Lab and LCH values</h3>
 		The declared, computed and used value
 		is the corresponding CIE Lab or LCH color
 		(after clamping of L, C and H)
-		paired with the specified alpha channel
+		paired with the specified alpha component
 		(as a <<number>>, not a <<percentage>>;
 		and defaulting to opaque if unspecified).
 
@@ -5875,7 +5875,7 @@ Resolving Oklab and OKLCh values</h3>
 		The declared, computed and used value
 		is the corresponding Oklab or OKLCh color
 		(after clamping of L, C and H)
-		paired with the specified alpha channel
+		paired with the specified alpha component
 		(as a <<number>>, not a <<percentage>>;
 		and defaulting to opaque if unspecified).
 
@@ -5895,7 +5895,7 @@ Resolving values of the ''color()'' function</h3>
 
 		The declared, computed and used value
 		is the color in the specified [=color space=],
-		paired with the specified alpha channel
+		paired with the specified alpha component
 		(as a <<number>>, not a <<percentage>>;
 		and defaulting to opaque if unspecified).
 
@@ -7236,7 +7236,7 @@ Changes</h2>
 	<li>Expressed that displaying as black or white when L=0% or 100% is due to gamut mapping. Removed incorrect assertions of powerlessness</li>
 	<li>Dropped the confusing "representing black" and "representing white" comments</li>
 	<li>Clarified that opponent a and b are analogous</li>
-	<li>Specified RGB channels using reference ranges rather than prose, for consistency</li>
+	<li>Specified RGB components using reference ranges rather than prose, for consistency</li>
 	<li>Explicitly referenced percent reference ranges for percentage to number conversion when serializing Lab, LCH, Oklab, OKLCh</li>
 	<li>Required Oklab interpolation, remove previous "may", describe explicit opt-out</li>
 	<li>Labelled the Lab, LCH, Oklab and OKLCh tutorial sections as non-normative. Moved some definitions out of the non-normative section.</li>
@@ -7390,7 +7390,7 @@ Changes</h2>
 	<li>Added description of CIE LCH deficiencies</li>
 	<li>Allowed all components of a color to be "missing" via the ''none'' keyword,
 		defined when components are "powerless" and automatically become missing in some cases,
-		and fixed all references to "NaN" channels to use the "missing" concept.</li>
+		and fixed all references to "NaN" components to use the "missing" concept.</li>
 	<li>Defined explicit x,y whitepoint values, use consistently throughout</li>
 	<li>Defined the term host syntax</li>
 	<li>Defined context for resolving override-color colors</li>
@@ -7581,7 +7581,7 @@ Changes</h2>
 	<li>Drop the "media" from propdef tables</li>
 	<li>Export, and consistently use, "transparent black" and "opaque black"</li>
 	<li>Clarify calculated values such as percents</li>
-	<li>Clarify required precision and rounding behavior for color channels</li>
+	<li>Clarify required precision and rounding behavior for color components</li>
 	<li>Clarify "color" property has no effect on color font glyphs (unless specifically referenced, e.g. with currentColor)</li>
 	<li>Clarify how color values are resolved</li>
 	<li>Clarify that HSL, HWB and named colors resolve to sRGB</li>