#121D2B

Accessibility

AAA

16.99:1

Vs white / black

16.99:1 · 1.24:1

Sources

Library color

Codes

Formats

HEX

#121d2b

RGB

rgb(18, 29, 43)

RGBA

rgba(18, 29, 43, 1)

HSL

hsl(214, 41%, 12%)

HSLA

hsla(214, 41%, 12%, 1)

HSV

hsv(214, 58%, 17%)

LAB

lab(10.42% 0.05 -10.94)

LCH

lch(10.42% 10.94 270.26)

OKLAB

oklab(0.2276 -0.0083 -0.0306)

OKLCH

oklch(0.2276 0.0317 254.82)

XYZ

xyz(1.12, 1.18, 2.45)

CMYK

cmyk(58%, 33%, 0%, 83%)

CSS

color: #121d2b;

CSS variable

--color-121d2b: #121d2b;

SCSS

$color-121d2b: #121d2b;

JavaScript

const color = "#121d2b";

TypeScript

const color: string = "#121d2b";

React

style={{ backgroundColor: "#121d2b" }}

JSON

{ "hex": "#121d2b", "rgb": { "r": 18, "g": 29, "b": 43 }, "oklch": "oklch(0.2276 0.0317 254.82)" }

Export

Developer code

css

:root {
  --#121d2b-1: #121d2b;
}

Design systems

Nearest official tokens

An arbitrary HEX is not an official Tailwind, Material, or Bootstrap color. Distance is CIEDE2000.

Nearest Tailwind color

gray-900

Noticeably different · ΔE 2.88 · #111827

Nearest CSS named color

Black

Very different · ΔE 10.77 · #000000

Nearest Material color

blue-grey-900

Very different · ΔE 8.69 · #263238

Nearest Bootstrap color

dark

Very different · ΔE 6.47 · #212529

OKLCH

Perceptual 50–950 scale

Generated in OKLCH from this hex. Not an official Tailwind scale unless the hex itself is a Tailwind token.

50ecf6ff 100dfe9f6 200cad5e5 300b2bfd0 40095a3b5 5007a8799 600657181 700505a67 8003c444f 900283039 950141b24

Palette

Tints & shades

Full scale from light tints through the base color into deep shades

ebeced d8d9dc c4c7ca b0b4b8 9ca1a7 898e95 757b83 616872 4d5660 3a434e 26303d 121d2b 111b27 0f1824 0e1620 0c131d 0a1119 090f16 070c12 060a0e 05070b 030507 020204

Palette

Tints

Mixed toward white — soft backgrounds and highlights

ebeced d8d9dc c4c7ca b0b4b8 9ca1a7 898e95 757b83 616872 4d5660 3a434e 26303d

Palette

Shades

Mixed toward black — depth, text, and emphasis

111b27 0f1824 0e1620 0c131d 0a1119 090f16 070c12 060a0e 05070b 030507 020204

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

1b2532 242e39 2e3640 373e47 40464e 494f56 52575d 5b5f64 65676b 6e7072 777879

Harmony

Complementary

Opposite on the color wheel for contrast

#121D2BStop 1 #2B2012Stop 2

Harmony

Analogous

Neighbors that sit comfortably together

#12292BStop 1 #121D2BStop 2 #14122BStop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#121D2BStop 1 #2B121DStop 2 #1D2B12Stop 3

Harmony

Split complementary

Base plus two accents beside the complement

#121D2BStop 1 #2B1412Stop 2 #292B12Stop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#1E3048Stop 1 #35547EStop 2 #4B79B4Stop 3 #81A1CAStop 4 #B7C9E1Stop 5

Using this color

Where #121d2b works

#121D2B (#121d2b) sits in the blue family at about 214° hue, 41% saturation, and 12% lightness. Contrast is 16.99:1 on white and 1.24:1 on black, so white labels read more clearly on the swatch itself. Nearest Tailwind token: gray-900 (approximation unless the hex is an official scale stop).

Sensible jobs for this swatch

body text, chrome, and dark-mode surfaces
text or icons on a white canvas

On a black or near-black UI, #121d2b is 1.24:1. Prefer it as a fill, border, or large heading rather than 16px copy.

Family context: Trust, calm, and professionalism. The most used color in SaaS, finance, and healthcare. Common uses still include buttons, charts, and accents in the Blue range — always verify the pair for this exact hex in the contrast checker.

Similar & related colors

Nearby colors from the library by perceptual distance

Tailwind gray 900#111827 Tailwind gray 800#1F2937 Tailwind slate 800#1E293B Tailwind slate 900#0F172A Tailwind slate 950#020617 Bootstrap dark#212529 Tailwind gray 950#030712 Material You On Surface#1C1B1F Tailwind zinc 900#18181B Tailwind zinc 800#27272A Tailwind sky 950#082F49 Material Blue Grey 900#263238