#121D3C#121D3C

#121D3C is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.0% C 0.061 H 267.0°. Best body text is #FFFFFF at 16.58:1 contrast (WCAG AA passes).

Color values

HEX	#121D3C
RGB	rgb(18, 29, 60)
HSL	hsl(224, 54%, 15%)
HSV	hsv(224, 70%, 24%)
CMYK	cmyk(70%, 51.7%, 0%, 76.5%)
CIE-LAB	lab(11.51, 6.97, -21.48)
CIE-LCH	lch(11.51, 22.58, 287.98°)
OKLab	oklab(23.96% -0.0032 -0.0613)
OKLCH	oklch(23.96% 0.061 267)
XYZ	xyz(1.5042, 1.3334, 4.4522)
Luminance	0.0133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121D3C #3C3112

analogous

#12323C #121D3C #1C123C

triadic

#121D3C #3C121D #1D3C12

tetradic

#121D3C #3C1232 #3C3112 #123C1C

square

#121D3C #3C1232 #3C3112 #123C1C

split-complementary

#121D3C #3C1C12 #323C12

monochromatic

#070B18 #070B18 #121D3C #20346B #2E4B9A

Accessibility & contrast

On white

16.58

#121D3C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#121D3C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121D3C

16.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121D3C	#FFFFFF	#000000	##FFFFFF
##121D3C	1.00	16.58	1.27	16.58
#FFFFFF	16.58	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F213D

Deuteranopia (green-blind)

#081D3B

Tritanopia (blue-blind)

#002429

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121d3c;
/* rgb */ color: rgb(18, 29, 60);
/* oklch */ color: oklch(24.0% 0.061 267.0);

Tailwind

colors: {
  custom: {
    50: '#555872',
    500: '#121d3c',
    950: '#000000',
  },
}

SCSS

$custom: #121d3c;
$custom-light: #555872;
$custom-dark: #000000;

JSON

{
  "hex": "#121d3c",
  "rgb": {
    "r": 18,
    "g": 29,
    "b": 60
  },
  "hsl": {
    "h": 224.286,
    "s": 53.846,
    "l": 15.294
  },
  "oklch": {
    "l": 0.23959,
    "c": 0.06135,
    "h": 267
  },
  "luminance": 0.01334
}

Semantic roles & 50–950 ramp

primary

#121D3C

secondary

#756435

accent

#B74BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #121D3C

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

Preview Lab → · Contrast checker → · Palette generator →