Rollup merge of #114777 - GuillaumeGomez:migrate-gui-test-color-32, r=notriddle

Migrate GUI colors test to original CSS color format

Follow-up of #111459.

r? `@notriddle`

Author: GuillaumeGomez

tests/rustdoc-gui/search-tab.goml

@@ -40,37 +40,37 @@ define-function: (
 
 call-function: ("check-colors", {
     "theme": "ayu",
-    "background": "rgba(0, 0, 0, 0)",
-    "background_selected": "rgb(20, 25, 32)",
-    "background_hover": "rgba(0, 0, 0, 0)",
-    "border_bottom": "0px none rgb(197, 197, 197)",
-    "border_bottom_selected": "1px solid rgb(255, 180, 76)",
+    "background": "transparent",
+    "background_selected": "#141920",
+    "background_hover": "transparent",
+    "border_bottom": "0px none #c5c5c5",
+    "border_bottom_selected": "1px solid #ffb44c",
     "border_bottom_hover": "1px solid rgba(242, 151, 24, 0.3)",
-    "border_top": "0px none rgb(197, 197, 197)",
-    "border_top_selected": "0px none rgb(197, 197, 197)",
-    "border_top_hover": "0px none rgb(197, 197, 197)",
+    "border_top": "0px none #c5c5c5",
+    "border_top_selected": "0px none #c5c5c5",
+    "border_top_hover": "0px none #c5c5c5",
 })
 call-function: ("check-colors", {
     "theme": "dark",
-    "background": "rgb(37, 37, 37)",
-    "background_selected": "rgb(53, 53, 53)",
-    "background_hover": "rgb(53, 53, 53)",
-    "border_bottom": "0px none rgb(221, 221, 221)",
-    "border_bottom_selected": "0px none rgb(221, 221, 221)",
-    "border_bottom_hover": "0px none rgb(221, 221, 221)",
-    "border_top": "2px solid rgb(37, 37, 37)",
-    "border_top_selected": "2px solid rgb(0, 137, 255)",
-    "border_top_hover": "2px solid rgb(0, 137, 255)",
+    "background": "#252525",
+    "background_selected": "#353535",
+    "background_hover": "#353535",
+    "border_bottom": "0px none #ddd",
+    "border_bottom_selected": "0px none #ddd",
+    "border_bottom_hover": "0px none #ddd",
+    "border_top": "2px solid #252525",
+    "border_top_selected": "2px solid #0089ff",
+    "border_top_hover": "2px solid #0089ff",
 })
 call-function: ("check-colors", {
     "theme": "light",
-    "background": "rgb(230, 230, 230)",
-    "background_selected": "rgb(255, 255, 255)",
-    "background_hover": "rgb(255, 255, 255)",
-    "border_bottom": "0px none rgb(0, 0, 0)",
-    "border_bottom_selected": "0px none rgb(0, 0, 0)",
-    "border_bottom_hover": "0px none rgb(0, 0, 0)",
-    "border_top": "2px solid rgb(230, 230, 230)",
-    "border_top_selected": "2px solid rgb(0, 137, 255)",
-    "border_top_hover": "2px solid rgb(0, 137, 255)",
+    "background": "#e6e6e6",
+    "background_selected": "#fff",
+    "background_hover": "#fff",
+    "border_bottom": "0px none #000",
+    "border_bottom_selected": "0px none #000",
+    "border_bottom_hover": "0px none #000",
+    "border_top": "2px solid #e6e6e6",
+    "border_top_selected": "2px solid #0089ff",
+    "border_top_hover": "2px solid #0089ff",
 })