#21253b

Color #21253b

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 16.87 Nearest Tailwind class slate-800 #1d293d · ΔE 4.3

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Conversions

HEX

#21253b

RGB

rgb(33, 37, 59)

HSL

hsl(230.8, 28.3%, 18%)

HSV / HSB

hsv(230.8, 44.1%, 23.1%)

CMYK

cmyk(44.1%, 37.3%, 0%, 76.9%)

LAB

lab(15.29, 4.95, -14.72)

LCH

lch(15.29, 15.53, 288.59)

OKLCH

oklch(27.2%, 0.0413, 275.42)

HWB

hwb(230.8, 12.9%, 76.9%)

Harmony colors

Complementary

#3b3721

Analogous

#21323b

#21253b

#2a213b

Triadic

#21253b

#3b2125

#253b21

Split-complementary

#21253b

#3b2a21

#323b21

Tetradic

#21253b

#37213b

#3b3721

#253b21

Square

#21253b

#3b2132

#3b3721

#213b2a

Shades

Color #21253b mixed toward black.

#1b1f31

#161927

#10121d

#0b0c14

#05060a

Tints

Color #21253b mixed toward white.

#3a4168

#535d94

#7982b4

#a6accd

#d2d5e6

Tones

Color #21253b mixed toward gray.

#232639

#252837

#272934

#2a2b32

#2c2c30

Accessibility

Aa White text on this color

15.08:1

Aa Black text on this color

1.39:1

White text reads better on this background (15.08:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#232337 · ΔE 1.9

Deuteranopia

#232235 · ΔE 2.5

Tritanopia

#213332 · ΔE 17.1

Achromatopsia

#262626 · ΔE 12

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

Code

CSS

background-color: #21253b;

Tailwind (arbitrary value)

bg-[#21253b]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#21253b (#21253b) is rgb(33, 37, 59) in RGB.

No, #21253b 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.

Try it → Accessibility

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 #21253b, or check how it holds up for accessibility.

Generate a palette → Check contrast