typo

Author: svgeesus

css-color-4/Overview.bs

@@ -337,7 +337,7 @@ the hue angle becomes indeterminate
 (for example, in Lab,
 minute changes in near-zero a and b values
 give huge changes in LCH hue angle).
-<span id="NaN-hue">Therefore, sometimes a hue angle of Nan
+<span id="NaN-hue">Therefore, sometimes a hue angle of NaN
 (not a number) may be returned.</span>
 This impacts, for example,
 <a href="https://drafts.csswg.org/css-color-5/#hue-interpolation">hue interpolation</a>.