#21243b

Color #21243b

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 17.69 Nearest Tailwind class slate-900 #0f172b · ΔE 4.9

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Conversions

HEX

#21243b

RGB

rgb(33, 36, 59)

HSL

hsl(233.1, 28.3%, 18%)

HSV / HSB

hsv(233.1, 44.1%, 23.1%)

CMYK

cmyk(44.1%, 39%, 0%, 76.9%)

LAB

lab(14.96, 5.68, -15.24)

LCH

lch(14.96, 16.26, 290.44)

OKLCH

oklch(26.9%, 0.043, 277.36)

HWB

hwb(233.1, 12.9%, 76.9%)

Harmony colors

Complementary

#3b3821

Analogous

#21313b

#21243b

#2b213b

Triadic

#21243b

#3b2124

#243b21

Split-complementary

#21243b

#3b2b21

#313b21

Tetradic

#21243b

#38213b

#3b3821

#243b21

Square

#21243b

#3b2131

#3b3821

#213b2b

Shades

Color #21243b mixed toward black.

#1b1e31

#161827

#10121d

#0b0c14

#05060a

Tints

Color #21243b mixed toward white.

#3a3f68

#535a94

#7980b4

#a6aacd

#d2d5e6

Tones

Color #21243b mixed toward gray.

#232639

#252737

#272934

#2a2b32

#2c2c30

Accessibility

Aa White text on this color

15.22:1

Aa Black text on this color

1.38:1

White text reads better on this background (15.22:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#222236 · ΔE 1.7

Deuteranopia

#222235 · ΔE 2

Tritanopia

#213232 · ΔE 17.1

Achromatopsia

#262626 · ΔE 12.5

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #21243b;

Tailwind (arbitrary value)

bg-[#21243b]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#21243b (#21243b) is rgb(33, 36, 59) in RGB.

No, #21243b is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #21243b, or check how it holds up for accessibility.

Generate a palette → Check contrast