HEX vs RGB: are they different, and which should you use?
HEX and RGB describe the exact same colors — HEX is just RGB written in base 16. So the choice is about ergonomics, not capability. Here is what actually differs.
| HEX | RGB | |
|---|---|---|
| Notation | #FF3D68 | rgb(255, 61, 104) |
| Same colors | Yes | Yes |
| Compactness | More compact | More verbose |
| Alpha syntax | #RRGGBBAA | rgb(... / 50%) or rgba() |
| Readability | Lower | Slightly higher |
| Best for | Design tools, terse CSS | Computed/dynamic colors |
They are the same thing
#FF3D68 and rgb(255, 61, 104) render identically. HEX writes each channel as two hex digits (00–FF); RGB writes them as decimals (0–255). Pick whichever your workflow reads more easily — convert either way in the Color Picker.
When the format matters
RGB shines when colors are computed — building a value from variables in JavaScript or CSS is cleaner with decimal channels. HEX wins for hand-written, static CSS where brevity helps. For *adjusting* a color (lighter, more muted), neither is ideal — reach for HSL.
The verdict
There is no wrong choice — they are equivalent. Use HEX for compact static CSS and design handoff, RGB for computed or dynamic colors. To tweak colors by hand, convert to HSL. The Color Picker shows all three at once.
Frequently asked questions
- Is there any visual difference between HEX and RGB?
- None. They are two notations for the same RGB color space; #FF3D68 and rgb(255, 61, 104) render identically.
- Which is better for CSS?
- Neither is universally better. HEX is more compact for static styles; RGB is cleaner when colors are computed from variables. It is mostly preference.
- How do I add transparency?
- In HEX add a fourth pair (#RRGGBBAA); in RGB use rgba(r, g, b, a) or modern rgb(r g b / a%).
Try it yourself
Free, in-browser tools for everything above.