#121C3D#121C3D

#121C3D is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.8% C 0.065 H 268.5°. Best body text is #FFFFFF at 16.68:1 contrast (WCAG AA passes).

Color values

HEX	#121C3D
RGB	rgb(18, 28, 61)
HSL	hsl(226, 54%, 15%)
HSV	hsv(226, 70%, 24%)
CMYK	cmyk(70.5%, 54.1%, 0%, 76.1%)
CIE-LAB	lab(11.25, 8.16, -22.60)
CIE-LCH	lch(11.25, 24.03, 289.85°)
OKLab	oklab(23.78% -0.0017 -0.0646)
OKLCH	oklch(23.78% 0.065 268.5)
XYZ	xyz(1.5067, 1.2959, 4.5847)
Luminance	0.0130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121C3D #3D3312

analogous

#12313D #121C3D #1E123D

triadic

#121C3D #3D121C #1C3D12

tetradic

#121C3D #3D1231 #3D3312 #123D1E

square

#121C3D #3D1231 #3D3312 #123D1E

split-complementary

#121C3D #3D1E12 #313D12

monochromatic

#070B18 #070B18 #121C3D #20326C #2E479C

Accessibility & contrast

On white

16.68

#121C3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#121C3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121C3D

16.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121C3D	#FFFFFF	#000000	##FFFFFF
##121C3D	1.00	16.68	1.26	16.68
#FFFFFF	16.68	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C203E

Deuteranopia (green-blind)

#051C3C

Tritanopia (blue-blind)

#002429

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121c3d;
/* rgb */ color: rgb(18, 28, 61);
/* oklch */ color: oklch(23.8% 0.065 268.5);

Tailwind

colors: {
  custom: {
    50: '#555773',
    500: '#121c3d',
    950: '#000000',
  },
}

SCSS

$custom: #121c3d;
$custom-light: #555773;
$custom-dark: #000000;

JSON

{
  "hex": "#121c3d",
  "rgb": {
    "r": 18,
    "g": 28,
    "b": 61
  },
  "hsl": {
    "h": 226.047,
    "s": 54.43,
    "l": 15.49
  },
  "oklch": {
    "l": 0.23784,
    "c": 0.06461,
    "h": 268.5
  },
  "luminance": 0.01296
}

Semantic roles & 50–950 ramp

primary

#121C3D

secondary

#766735

accent

#BB4ADE

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #121C3D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →