back css...
color: nama warna
color: blue;
color: #ffffff (6digit #RRGGBB) #008080 00=red 80=green 80=blue
color: #01f; (3digit #RGB)
color: #0011ff;
color: #01f;
color: rgb(red, green, blue)
color: rgba(red, green, blue, alpha)
color: rgb(255, 128, 255);
color: rgba(40, 23, 111, 0.7);
color: hsl(hue, saturation, lightness)
color: hsla(hue, saturation, lightness, alpha)
color: hsl(267, 80%, 45%, 0.6);
background: linear-gradient(90deg, rgba(34, 193,195, 1) 0%, rgba(240, 45, 253, 1) 100%);