Support transparent and currentColor

web/core/src/jsMain/kotlin/org/jetbrains/compose/web/css/Color.kt

@@ -162,6 +162,9 @@ object Color {
     inline val whitesmoke get() = Color("whitesmoke")
     inline val yellowgreen get() = Color("yellowgreen")
     inline val yellow get() = Color("yellow")
+
+    inline val transparent get() = Color("transparent")
+    inline val currentColor get() = Color("currentColor")
 }
 
 fun Color(name: String): CSSColorValue = name.unsafeCast<CSSColorValue>()

web/core/src/jsTest/kotlin/css/ColorTests.kt

@@ -154,6 +154,9 @@ class ColorTests {
             Div({ style { color(Color.whitesmoke) } })
             Div({ style { color(Color.yellowgreen) } })
             Div({ style { color(Color.yellow) } })
+
+            Div({ style { color(Color.transparent) } })
+            Div({ style { color(Color.currentColor) } })
         }
 
         var counter = 0
@@ -293,5 +296,7 @@ class ColorTests {
         assertEquals("whitesmoke", (root.children[counter++] as HTMLElement).style.color)
         assertEquals("yellowgreen", (root.children[counter++] as HTMLElement).style.color)
         assertEquals("yellow", (root.children[counter++] as HTMLElement).style.color)
+        assertEquals("transparent", (root.children[counter++] as HTMLElement).style.color)
+        assertEquals("currentcolor", (root.children[counter++] as HTMLElement).style.color)
     }
 }