CSS named color

Royal Blue #4169E1

Royal Blue is blue. Below: every color format, WCAG contrast against black and white, its tints, shades and tones, and the harmonies that pair with it.

Color values

Contrast & accessibility

WCAG contrast ratio of Royal Blue used as a foreground on white and black backgrounds.

Aa The quick brown fox
4.85:1

On white

AA ✓ AAA ✕ AA Large ✓
Aa The quick brown fox
4.33:1

On black

AA ✕ AAA ✕ AA Large ✓

Tints, shades & tones

Systematic variations of Royal Blue — click any swatch to copy its hex.

Tintsmixed toward white
Shadesmixed toward black
Tonesmixed toward gray

Color harmonies

Palettes built from Royal Blue by rotating its hue. Each swatch links to its closest named color.

Complementary

#4169E1 ≈ Slate Blue #E1B941 ≈ Goldenrod

Analogous

#41B9E1 ≈ Medium Turquoise #4169E1 ≈ Slate Blue #6941E1 ≈ Slate Blue

Triadic

#4169E1 ≈ Slate Blue #E14169 ≈ Indian Red #69E141 ≈ Yellow Green

Split-complementary

#4169E1 ≈ Slate Blue #E16941 ≈ Tomato #B9E141 ≈ Yellow Green

Tetradic

#4169E1 ≈ Slate Blue #E141B9 ≈ Medium Orchid #E1B941 ≈ Goldenrod #41E169 ≈ Medium Sea Green

Use Royal Blue in your stack

Tailwind (arbitrary value)

Works for any property: text-[#4169e1], border-[#4169e1].

CSS custom property

Reference it anywhere with var(--color).

Build a full theme

Turn Royal Blue into a complete shadcn/ui palette — light & dark, contrast-checked, one-command install.

Extract a theme →

Similar named colors

Slate Blue #6A5ACD Steel Blue #4682B4 Medium Slate Blue #7B68EE Cornflower Blue #6495ED Dodger Blue #1E90FF Medium Purple #9370DB

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