]css-color-4] Explicitly note the presence or absence of legacy color syntax for each form, see #6911

Author: svgeesus

css-color-4/Overview.bs

@@ -1494,16 +1494,16 @@ The RGB functions: ''rgb()'' and ''rgba()''</h3>
 	but are clamped to the ranges defined here at computed-value time.
 
 	For legacy reasons,
-	''rgb()'' also supports an alternate syntax
+	''rgb()'' also supports a <a>legacy color syntax</a>
 	that separates all of its arguments with commas:
 
 	<pre class='prod'>
 	rgb() = rgb( <<percentage>>#{3} , <<alpha-value>>? ) |
 	  rgb( <<number>>#{3} , <<alpha-value>>? )
 	</pre>
 
-	Also for legacy reasons,
-	an <dfn>rgba()</dfn> function also exists,
+	Also,
+	an <dfn>rgba()</dfn> <a>legacy color syntax</a> also exists,
 	with an identical grammar and behavior to ''rgb()''.
 
 	<wpt>
@@ -2401,15 +2401,15 @@ HSL Colors: ''hsl()'' and ''hsla()'' functions</h2>
 	</div>
 
 	For legacy reasons,
-	''hsl()'' also supports an alternate syntax
+	''hsl()'' also supports a <a>legacy color syntax</a>
 	that separates all of its arguments with commas:
 
 	<pre class='prod'>
 	hsl() = hsl( <<hue>>, <<percentage>>, <<percentage>>, <<alpha-value>>? )
 	</pre>
 
-	Also for legacy reasons,
-	an <dfn>hsla()</dfn> function also exists,
+	Also,
+	an <dfn>hsla()</dfn> <a>legacy color syntax</a> also exists,
 	with an identical grammar and behavior to ''hsl()''.
 
 	<wpt>
@@ -2798,8 +2798,9 @@ HWB Colors: ''hwb()'' function</h2>
 	without any hint of the chosen hue.
 	In this case, the hue component is [=powerless=].
 
-	There is no legacy with ''hwb'', and so
-	''hwb()'' does <em>not</em> support an alternate syntax
+	There is no Web compatibility issue
+	with ''hwb'', which is new in this level of the specification, and so
+	''hwb()'' does <em>not</em> support a <a>legacy color syntax</a>
 	that separates all of its arguments with commas.
 	Using commas inside ''hwb()'' is an error.
 
@@ -3439,6 +3440,12 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 		</pre>
 	</div>
 
+	There is no Web compatibility issue
+	with ''lab'' or ''lch''', which are new in this level of the specification, and so
+	''lab()'' and ''lch()'' do <em>not</em> support a <a>legacy color syntax</a>
+	that separates all of their arguments with commas.
+	Using commas inside these functions is an error.
+
 <h3 id="specifying-oklab-oklch">
 	Specifying OKLab and OKLCH: the ''oklab()'' and ''oklch()'' functional notations</h3>
 
@@ -3553,6 +3560,12 @@ Specifying Lab and LCH: the ''lab()'' and ''lch()'' functional notations</h3>
 			</pre>
 		</div>
 
+	There is no Web compatibility issue
+	with ''oklab'' or ''oklch''', which are new in this level of the specification, and so
+	''oklab()'' and ''oklch()'' do <em>not</em> support a <a>legacy color syntax</a>
+	that separates all of their arguments with commas.
+	Using commas inside these functions is an error.
+
 
 <h3 id='lab-to-lch'>
 Converting Lab or OKLab colors to LCH or OKLCH colors</h3>
@@ -3618,13 +3631,13 @@ Predefined Color Spaces</h2>
 
 
 <!--
- ██████   ███████  ██        ███████  ████████    ███  ███
-██    ██ ██     ██ ██       ██     ██ ██     ██  ██      ██
-██       ██     ██ ██       ██     ██ ██     ██ ██        ██
-██       ██     ██ ██       ██     ██ ████████  ██        ██
-██       ██     ██ ██       ██     ██ ██   ██   ██        ██
-██    ██ ██     ██ ██       ██     ██ ██    ██   ██      ██
- ██████   ███████  ████████  ███████  ██     ██   ███  ███
+ ██████   ███████  ██        ███████  ████████    ███    ███
+██    ██ ██     ██ ██       ██     ██ ██     ██  ██        ██
+██       ██     ██ ██       ██     ██ ██     ██ ██          ██
+██       ██     ██ ██       ██     ██ ████████  ██          ██
+██       ██     ██ ██       ██     ██ ██   ██   ██          ██
+██    ██ ██     ██ ██       ██     ██ ██    ██   ██        ██
+ ██████   ███████  ████████  ███████  ██     ██   ███    ███
 -->
 
 <h3 id="color-function">Specifying predefined colors: the ''color()'' function</h3>
@@ -3718,6 +3731,11 @@ Predefined Color Spaces</h2>
 		This is interpreted the same way as the <<alpha-value>> in ''rgb()'',
 		and if omitted it defaults to ''100%''.
 
+	There is no Web compatibility issue
+	with ''color()'', which is new in this level of the specification, and so
+	''color()'' does <em>not</em> support a <a>legacy color syntax</a>
+	that separates all of its arguments with commas.
+	Using commas inside this function is an error.
 
 	A color which is either an [=invalid color=] or
 	an [=out of  gamut=] color