[css-color-5] Use reference ranges for lightness and alpha, too #9016

Author: svgeesus

css-color-5/Overview.bs

@@ -1075,7 +1075,8 @@ the allowed [=channel keywords=] are:
 	that correspond to the [=origin color's=] red, green, and blue channels
 	after <a href="#required-conversion">conversion, if required</a> to sRGB. 
 	255.0 is equivalent to 100%.
-* <dfn value for="rgb()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="rgb()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 <div class="example">
 	To manipulate color channels in the sRGB color space:
@@ -1143,7 +1144,8 @@ the allowed [=channel keywords=] are:
 	HSL saturation and lightness,
 	after <a href="#required-conversion">conversion, if required</a> to sRGB.
 	100 is equivalent to 100%.
-* <dfn value for="hsl()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="hsl()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency 1.0 is equivalent to 100%.
 
 <div class="example">
 	This adds 180 degrees to the hue angle, giving a complementary color.
@@ -1180,7 +1182,8 @@ the allowed [=channel keywords=] are:
 	are <<number>>s that correspond to the [=origin color's=] HWB whiteness and blackness
 	after <a href="#required-conversion">conversion, if required</a> to sRGB.
 	100 is equivalent to 100%.
-* <dfn value for="hwb()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="hwb()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 <h3 id="relative-Lab">Relative Lab Colors</h3>
 
@@ -1200,12 +1203,14 @@ the allowed [=channel keywords=] are:
 
 * <dfn value for="lab()">l</dfn> is a <<number>>
 	that corresponds to the [=origin color's=] CIE Lightness
-	after <a href="#required-conversion">conversion, if required</a>, to CIE Lab
+	after <a href="#required-conversion">conversion, if required</a>, to CIE Lab.
+	100 is equivalent to 100%.
 * <dfn value for="lab()">a</dfn> and <dfn value for="lab()">b</dfn> are <<number>>s
 	that correspond to the [=origin color's=] CIE Lab a and b axes
 	after <a href="#required-conversion">conversion, if required</a>, to CIE Lab.
 	125 is equivalent to 100%, while -125 is equivalent to -100%.
-* <dfn value for="lab()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="lab()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 <div class="example">
 	Multiple ways to adjust the transparency of a base color:
@@ -1250,12 +1255,14 @@ the allowed [=channel keywords=] are:
 
 * <dfn value for="oklab()">l</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] Oklab Lightness
-	after <a href="#required-conversion">conversion, if required</a>, to Oklab
+	after <a href="#required-conversion">conversion, if required</a>, to Oklab.
+	1.0 is equivalent to 100%.
 * <dfn value for="oklab()">a</dfn> and <dfn value for="oklab()">b</dfn> are <<number>>s
 	that correspond to the [=origin color's=] Oklab a and b axes
 	after <a href="#required-conversion">conversion, if required</a>, to Oklab.
 	0.4 is equivalent to 100%, while -0.4 is equivalent to -100%.
-* <dfn value for="oklab()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="oklab()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 <h3 id="relative-LCH">Relative LCH Colors</h3>
 
@@ -1275,7 +1282,8 @@ the allowed [=channel keywords=] are:
 
 * <dfn value for="lch()">l</dfn> is a <<number>>
 	that corresponds to the [=origin color's=] CIE Lightness
-	after <a href="#required-conversion">conversion, if required</a>, to CIE LCH
+	after <a href="#required-conversion">conversion, if required</a>, to CIE LCH.
+	100 is equivalent to 100%.
 * <dfn value for="lch()">c</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] LCH chroma
 	after <a href="#required-conversion">conversion, if required</a>, to CIE LCH.
@@ -1284,7 +1292,8 @@ the allowed [=channel keywords=] are:
 	that corresponds to the [=origin color's=] LCH hue, in degrees,
 	after <a href="#required-conversion">conversion, if required</a>, to CIE LCH,
 	normalized to a [0, 360] range. 90 is equivalent to 90deg.
-* <dfn value for="lch()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="lch()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 
 <div class="example">
@@ -1409,7 +1418,8 @@ the allowed [=channel keywords=] are:
 
 * <dfn value for="oklch()">l</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] Oklab Lightness
-	after <a href="#required-conversion">conversion, if required</a>, to Oklch
+	after <a href="#required-conversion">conversion, if required</a>, to Oklch.
+	1.0 is equivalent to 100%.
 * <dfn value for="oklch()">c</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] Oklch chroma
 	after <a href="#required-conversion">conversion, if required</a>, to Oklch.
@@ -1418,7 +1428,8 @@ the allowed [=channel keywords=] are:
 	that corresponds to the [=origin color's=] Oklch hue, in degrees,
 	after <a href="#required-conversion">conversion, if required</a>, to Oklch,
 	normalized to a [0, 360] range. 90 is equivalent to 90deg.
-* <dfn value for="oklch()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="oklch()">alpha</dfn> is a <<number>> that corresponds to the 
+	[=origin color's=] alpha transparency. 1.0 is equivalent to 100%.
 
 	Because Oklch is both perceptually uniform and chroma-preserving,
 	and because the axes correspond to easily understood attributes of a color,