#121b3c

Color #121b3c

A moderately saturated very dark blue.

Closest named color Charcoal #36454f · ΔE 25.67 Nearest Tailwind class slate-900 #0f172b · ΔE 5.3

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Conversions

HEX

#121b3c

RGB

rgb(18, 27, 60)

HSL

hsl(227.1, 53.8%, 15.3%)

HSV / HSB

hsv(227.1, 70%, 23.5%)

CMYK

cmyk(70%, 55%, 0%, 76.5%)

LAB

lab(10.84, 8.51, -22.55)

LCH

lch(10.84, 24.1, 290.68)

OKLCH

oklch(23.5%, 0.0644, 269.47)

HWB

hwb(227.1, 7.1%, 76.5%)

Harmony colors

Complementary

#3c3312

Analogous

#12303c

#121b3c

#1e123c

Triadic

#121b3c

#3c121b

#1b3c12

Split-complementary

#121b3c

#3c1e12

#303c12

Tetradic

#121b3c

#33123c

#3c3312

#1b3c12

Square

#121b3c

#3c1230

#3c3312

#123c1e

Shades

Color #121b3c mixed toward black.

#0f1732

#0c1228

#090e1e

#060914

#03050a

Tints

Color #121b3c mixed toward white.

#233473

#334dab

#5972cd

#90a1de

#c8d0ee

Tones

Color #121b3c mixed toward gray.

#161d39

#191f35

#1d2132

#20232e

#24252b

Accessibility

Aa White text on this color

16.83:1

Aa Black text on this color

1.25:1

White text reads better on this background (16.83:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#161636 · ΔE 3

Deuteranopia

#161534 · ΔE 3.5

Tritanopia

#13312f · ΔE 22.9

Achromatopsia

#1d1d1d · ΔE 16.3

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

Code

CSS

background-color: #121b3c;

Tailwind (arbitrary value)

bg-[#121b3c]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#121b3c (#121b3c) is rgb(18, 27, 60) in RGB.

No, #121b3c is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

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 #121b3c, or check how it holds up for accessibility.

Generate a palette → Check contrast