Bug 1888276 [wpt PR 45393] - Update wpt metadata, a=testonly

wpt-pr: 45393
wpt-type: metadata

testing/web-platform/meta/css/css-color/parsing/color-computed-relative-color.html.ini

@@ -2683,3 +2683,24 @@
 
   [Property color value 'color(from color(from color(xyz-d65 0.99 0.88 0.77) xyz-d65 x y z) xyz-d65 x y z)']
     expected: FAIL
+
+  [Property color value 'color-mix(in srgb, rgb(from rebeccapurple none g b), rebeccapurple)']
+    expected: FAIL
+
+  [Property color value 'color-mix(in hsl, hsl(from rebeccapurple none s l), rebeccapurple)']
+    expected: FAIL
+
+  [Property color value 'color-mix(in hwb, hwb(from rebeccapurple none w b), rebeccapurple)']
+    expected: FAIL
+
+  [Property color value 'color-mix(in lab, lab(from lab(25 20 50) none a b), lab(25 20 50))']
+    expected: FAIL
+
+  [Property color value 'color-mix(in oklab, oklab(from oklab(0.25 0.2 0.5) none a b), oklab(0.25 0.2 0.5))']
+    expected: FAIL
+
+  [Property color value 'color-mix(in lch, lch(from lch(0.7 45 30) l c none), lch(0.7 45 30))']
+    expected: FAIL
+
+  [Property color value 'color-mix(in oklch, oklch(from oklch(0.7 0.45 30) l c none), oklch(0.7 0.45 30))']
+    expected: FAIL