#21337b

Color #21337b

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 9.59 Nearest Tailwind class blue-900 #1c398e · ΔE 3.3

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Conversions

HEX

#21337b

RGB

rgb(33, 51, 123)

HSL

hsl(228, 57.7%, 30.6%)

HSV / HSB

hsv(228, 73.2%, 48.2%)

CMYK

cmyk(73.2%, 58.5%, 0%, 51.8%)

LAB

lab(24.07, 19.34, -43.16)

LCH

lch(24.07, 47.3, 294.14)

OKLCH

oklch(35.3%, 0.1243, 268.57)

HWB

hwb(228, 12.9%, 51.8%)

Harmony colors

Complementary

#7b6921

Analogous

#21607b

#21337b

#3c217b

Triadic

#21337b

#7b2133

#337b21

Split-complementary

#21337b

#7b3c21

#607b21

Tetradic

#21337b

#69217b

#7b6921

#337b21

Square

#21337b

#7b2160

#7b6921

#217b3c

Shades

Color #21337b mixed toward black.

#1c2b67

#162252

#111a3e

#0b1129

#060915

Tints

Color #21337b mixed toward white.

#2d46aa

#4560cd

#7388da

#a2b0e6

#d0d7f3

Tones

Color #21337b mixed toward gray.

#293874

#303c6c

#384165

#3f455d

#474a56

Accessibility

Aa White text on this color

11.51:1

Aa Black text on this color

1.82:1

White text reads better on this background (11.51:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2a2a6f · ΔE 4.1

Deuteranopia

#29276c · ΔE 4.9

Tritanopia

#226461 · ΔE 30.4

Achromatopsia

#393939 · ΔE 23.3

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

Code

CSS

background-color: #21337b;

Tailwind (arbitrary value)

bg-[#21337b]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#21337b (#21337b) is rgb(33, 51, 123) in RGB.

No, #21337b 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 #21337b, or check how it holds up for accessibility.

Generate a palette → Check contrast