article HEX vs RGB (2026) | 247QuickTools
⚖️ Comparison · Updated for 2026

HEX vs RGB

Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.

Quick answer: HEX (#RRGGBB) and RGB (rgb(r,g,b)) are the same colour in different notation. Both describe colours by red, green, blue intensity (0-255). HEX is more compact; RGB makes the values easier to read at a glance. Both have RGBA variants for transparency.
Decision guide — when to use which
Use HEX when…

CSS authoring (shorter), design tools (Figma, Adobe), social media bios.

Use RGB when…

CSS when you need alpha (rgba), JavaScript canvas, programmatic colour manipulation.

📊 Side-by-side comparison
Aspect HEX RGB
Pure red #FF0000 rgb(255, 0, 0)
White #FFFFFF rgb(255, 255, 255)
With transparency #FF0000CC (8-digit hex) rgba(255, 0, 0, 0.8)
Character count 7 (#RRGGBB) 13+ (rgb(r,g,b))
Browser support Universal Universal

Frequently asked

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Can I use 3-character HEX like #F00?

Yes — 3-character HEX is shorthand for 6-character: #F00 = #FF0000. Each digit gets doubled. It only works for colours where each channel uses the same hex digit doubled (so #F50 ≠ #FF5500 in 3-character syntax, but you can write it as the 6-char #FF5500).

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What's the difference between RGB and HSL?

RGB sets colour by amount of red, green, blue light. HSL (hue, saturation, lightness) describes colour by where it sits on the colour wheel and how vivid/dark it is. HSL is often easier for designers to think with.

Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.

Frequently asked questions

Can I use 3-character HEX like #F00?

Yes — 3-character HEX is shorthand for 6-character: #F00 = #FF0000. Each digit gets doubled. It only works for colours where each channel uses the same hex digit doubled (so #F50 ≠ #FF5500 in 3-character syntax, but you can write it as the 6-char #FF5500).

What's the difference between RGB and HSL?

RGB sets colour by amount of red, green, blue light. HSL (hue, saturation, lightness) describes colour by where it sits on the colour wheel and how vivid/dark it is. HSL is often easier for designers to think with.