🎨 CSS syntax now supported as fill input

The following example CSS syntax are now supported as fill input:

• #rrggbbaa
• rgb(34, 12, 64);
• rgb(34, 12, 64, 0.6);
• rgba(34, 12, 64, 0.6);
• hsl(30, 100%, 50%);
• hsl(30, 100%, 50%, 0.6);
• hsla(30, 100%, 50%, 0.6);