CSS Transparency Guide

A complete guide to color transparency in CSS. Opacity-to-hex conversion table, RGBA, HSLA, and modern CSS formats.

Live Preview

HEX8
RGBA
HSLA

Opacity to Hex Alpha Reference

OpacityHex AlphaDecimalPreview
0%0.00
5%0.05
10%0.10
15%0.15
20%0.20
25%0.25
30%0.30
40%0.40
50%0.50
60%0.60
70%0.70
75%0.75
80%0.80
85%0.85
90%0.90
95%0.95
100%1.00