[css-color-5] Same for alpha, w3c#7114

Author: svgeesus

css-color-5/Overview.bs

@@ -1077,7 +1077,7 @@ the allowed [=channel keywords=] are:
 	that correspond to the [=origin color's=] red, green, and blue channels
 	after its conversion to sRGB. For <<number>>s, 255 (or 255.0)
 	is equivalent to 100%.
-* <dfn value for="rgb()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="rgb()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <div class="example">
 	To manipulate color channels in the sRGB color space:
@@ -1136,7 +1136,7 @@ the allowed [=channel keywords=] are:
 * <dfn value for="hsl()">s</dfn> and <dfn value for="hsl()">l</dfn>
 	are <<percentage>>s or <<number>>s that correspond to the [=origin color's=] HSL saturation and lightness
 	after its conversion to sRGB
-* <dfn value for="hsl()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="hsl()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <div class="example">
 	This adds 180 degrees to the hue angle, giving a complementary color.
@@ -1172,7 +1172,7 @@ the allowed [=channel keywords=] are:
 * <dfn value for="hwb()">w</dfn> and <dfn value for="hwb()">b</dfn>
 	are <<percentage>>s or <<number>>s that correspond to the [=origin color's=] HWB whiteness and blackness
 	after its conversion to sRGB
-* <dfn value for="hwb()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="hwb()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <h3 id="relative-Lab">Relative Lab colors</h3>
 
@@ -1194,7 +1194,7 @@ the allowed [=channel keywords=] are:
 	that corresponds to the [=origin color's=] CIE Lightness
 * <dfn value for="lab()">a</dfn> and <dfn value for="lab()">b</dfn> are <<percentage>>s or <<number>>s
 	that correspond to the [=origin color's=] CIELab a and b axes
-* <dfn value for="lab()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="lab()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <div class="example">
 	Multiple ways to adjust the transparency of a base color:
@@ -1238,7 +1238,7 @@ the allowed [=channel keywords=] are:
 	that corresponds to the [=origin color's=] OKLab Lightness
 * <dfn value for="oklab()">a</dfn> and <dfn value for="oklab()">b</dfn> are <<percentage>>s or <<number>>s
 	that correspond to the [=origin color's=] OKLab a and b axes
-* <dfn value for="oklab()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="oklab()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <h3 id="relative-LCH">Relative LCH colors</h3>
 
@@ -1263,7 +1263,7 @@ the allowed [=channel keywords=] are:
 * <dfn value for="lch()">h</dfn> is an <<angle>>
 	that corresponds to the [=origin color's=] LCH hue,
 	normalized to a [0deg, 360deg) range.
-* <dfn value for="lch()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="lch()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 	Because LCH is both perceptually uniform and chroma-preserving,
 	and because the axes correspond to easily understood attributes of a color,
@@ -1390,7 +1390,7 @@ the allowed [=channel keywords=] are:
 * <dfn value for="oklch()">h</dfn> is an <<angle>>
 	that corresponds to the [=origin color's=] OKLCH hue,
 	normalized to a [0deg, 360deg) range.
-* <dfn value for="oklch()">alpha</dfn> is a <<percentage>> that corresponds to the [=origin color's=] alpha transparency
+* <dfn value for="oklch()">alpha</dfn> is a <<number>> or <<percentage>> that corresponds to the [=origin color's=] alpha transparency
 
 <div class="example" id="ex-oklch-wildly-oog">
 In this example, the aim is again to produce a new color