[css-color-5][editorial] markup fixes for bikeshed

Author: tabatkins

css-color-5/Overview.bs

@@ -95,9 +95,13 @@ Lastly, compatibility with legacy Web content may be the most important consider
 	<dfn>&lt;color-space></dfn> = srgb | hsl | hwb | xyz | lab | lch
 </pre>
 
+<p dfn-type=value dfn-for="<color-space>">
+	The <dfn>srgb</dfn>, <dfn>hsl</dfn>, <dfn>hwb</dfn>, <dfn>xyz</dfn>, <dfn>lab</dfn>, and <dfn>lch</dfn> keywords
+	each refer to their corresponding color space.
+
 When no <<color-space>> is specified,
 the mixing is done in the ''lch'' color space.
-The [=xyz=] color space is CIE XYZ, with a D50 whitepoint, and allows computation to be done
+The ''xyz'' color space is CIE XYZ, with a D50 whitepoint, and allows computation to be done
 in a linear-light-intensity space.
 
 
@@ -542,15 +546,16 @@ Selecting the most contrasting color: the ''color-contrast()'' function {#colorc
 	to the single color.
 
 	The single color is separated from the list
-	with the keyword 'vs'
+	with the keyword <css>vs</css>
 	and the target contrast, if present, is separated from the list
-	with the keyword 'to'.
+	with the keyword <css>to</css>.
 
 	<pre class='prod'>
 		<dfn>color-contrast()</dfn> = color-contrast( <<color>> vs <<color>>#{2,}  [ to [<<number>> | AA | AA-large]]? )
 	</pre>
 
-	The keyword 'AA' is equivalent to 4.5, and the keyword 'AA-large' is equivalent to 3.
+	The keyword <dfn value for="color-contrast()">AA</dfn> is equivalent to ''4.5'',
+	and the keyword <dfn value for="color-contrast()">AA-large</dfn> is equivalent to ''3''.
 
 	<div class="example">
 		<pre class="lang-css">color-contrast(wheat vs tan, sienna, var(--myAccent), #d2691e)</pre>
@@ -612,7 +617,7 @@ Selecting the most contrasting color: the ''color-contrast()'' function {#colorc
 
 	If there is a target contrast,
 	and the end of the list is reached without meeting that target,
-	either 'white' or 'black' is returned,
+	either ''white'' or ''black'' is returned,
 	whichever has the higher contrast.
 
 	<div class="example">
@@ -716,27 +721,27 @@ Adjusting colors: the ''color-adjust'' function {#coloradjust}
 	</pre>
 
 	The meaning of the adjusters is defined by color space.
-	For example, if the <<color-space>> is [=hsl=],
+	For example, if the <<color-space>> is ''hsl'',
 	hue means the HSL hue, which is not the same as the LCH hue;
-	if the color space is [=lch=],
+	if the color space is ''lch'',
 	lightness means the LCH Lightness, which is the same as Lab lightness,
 	but different to the HSL Lightness.
 
-	Only the [=color-adjuster=]s defined for a given <<color-space>> are available.
-	For example, it is not possible to use the HWB [=whiteness=] adjuster unless the color space is [=hwb=].
+	Only the <<color-adjuster>>s defined for a given <<color-space>> are available.
+	For example, it is not possible to use the HWB ''whiteness'' adjuster unless the color space is ''hwb''.
 	The alpha adjuster is available on any <<color-space>>.
 
-	Note: not all [=color-adjuster=]s are equally useful.
+	Note: not all <<color-adjuster>>s are equally useful.
 	Adjustments in LCH are the most useful, which is why it is the default.
 	Adjustments on the a and b axes are rarely needed.
-	Adjustments in the srgb-related spaces (srgb itself, hsl, hwb)
+	Adjustments in the srgb-related spaces (''srgb'' itself, ''hsl'', ''hwb'')
 	are provided mainly for backward compatibility
 	with the sorts of adjustments currently done in CSS preprocessors.
 	Adjusting the individual x, y and z channels will produce significant hue shifts;
 	however, adjusting all three channels together is useful
 	and will lighten or darken the color.
 
-	The [=hue-adjuster=] takes optional keywords, to specify the [[css-color-4#hue-interpolation]] algorithm.
+	The <<hue-adjuster>> takes optional keywords, to specify the [[css-color-4#hue-interpolation]] algorithm.
 	If no keyword is specified, it is as if ''shorter'' were specified.
 
 	<div class="example">