[ #450389 ] Color attval check allows only black/#

Test black
Test green
Test silver
Test lime
Test gray
Test olive
Test white
Test yellow
Test maroon
Test navy
Test red
Test blue
Test purple
Test teal
Test fuchsia
Test aqua

Test Red
Test RED

Test invalid reddish

Test black #000000
Test green #008000
Test silver #C0C0C0
Test lime #00FF00
Test gray #808080
Test olive #808000
Test white #FFFFFF
Test yellow #FFFF00
Test maroon #800000
Test navy #000080
Test red #FF0000
Test blue #0000FF
Test purple #800080
Test teal #008080
Test fuchsia #FF00FF
Test aqua #00FFFF

Test red #ff0000
Test red #fF0000

Test invalid red #FF

Test invalid grurple
Test invalid #grurple
Test invalid #1234567