colors

color: white;
color : #fff;
color: #FFFFFF;
color: transparent;
color: currentColor;
color: rgb(255,255,255); 
color: rgb(100%,100%,100%);
color: rgba(255,255,255, 1);
color: hsl(0, 100%, 100%)

Border defaults to currentColor which is color of text

Alpha: 0-1

HSLAddd(Hue, saturation, lightness, and alphatranspency)

Transparent == rgba(0, 0, 0, 0);

Opacity vs AlphaTransparent

Alphatransparent just makes text transparent

Opacity, text element shadow, everything becomes transparent