How RGB to Hex Converter Works
An RGB to Hex Converter is a color translation utility used to turn Red-Green-Blue values (0-255) into Hexadecimal strings. This tool is essential for web designers, UI/UX artists, and frontend developers converting design specs (from Photoshop/Figma) into CSS-ready code.
The conversion engine handles the math through a component pipeline:
- Input Validation: It ensures R, G, and B are integers between 0 and 255.
- Hex Selection: It converts each component to Base-16:
- R: $255 →
FF - G: $165 →
A5 - B: $0 →
00
- R: $255 →
- Concatenation: It joins them into a triplet:
FFA500(Orange). - Preview: It renders a live color swatch to visually validate the result.
The History of Web Colors
From 16 colors to 16 million.
- VGA (1987): Monitors could only show 16 colors. Cyan, Magenta, etc.
- The "Web Safe" Era (1990s): Screens supported 256 colors. Netscape curated a list of 216 "Safe" colors that wouldn't dither.
- True Color (24-bit): Modern screens support 16.7 million colors (
256 * 256 * 256). Hex codes allow us to address every single one of them.
Technical Comparison: CSS Formats
How to write color.
| Format | Syntax | Support | Use Case |
|---|---|---|---|
| Hex | #FF0000 |
100% | Standard |
| RGB | rgb(255, 0, 0) |
100% | Scripting |
| RGBA | rgba(255, 0, 0, 0.5) |
99% | Transparency |
| HSL | hsl(0, 100%, 50%) |
99% | Designers |
By using this tool, you ensure your brand colors are consistent across all platforms.