x
<html><head><style>#p1 {background-color:#ff0000;}#p1a {background-color:#ff000080;}#p2 {background-color:#00ff00;}#p2a {background-color:#00ff0080;}#p3 {background-color:#0000ff;}#p3a {background-color:#0000ff80;}#p4 {background-color:#ffff00;}#p4a {background-color:#ffff0080;}#p5 {background-color:#ff00ff;}#p5a {background-color:#ff00ff80;}</style></head><body><h2>HEX colors with transparency</h2><p>A hexadecimal color is specified with: #RRGGBB. To add transparency, add two additional digits between 00 and FF.</p><p id="p1">Red</p><p id="p1a">Red transparency</p><p id="p2">Green</p><p id="p2a">Green transparency</p><p id="p3">Blue</p><p id="p3a">Blue transparency</p><p id="p4">Yellow</p><p id="p4a">Yellow transparency</p><p id="p5">Cerise</p><p id="p5a">Cerise transparency</p></body></html>