#121D3B#121D3B

#121D3B is a very dark, muted blue. Relative luminance 0.013; OKLCH L 23.9% C 0.060 H 266.7°. Best body text is #FFFFFF at 16.61:1 contrast (WCAG AA passes).

Color values

HEX	#121D3B
RGB	rgb(18, 29, 59)
HSL	hsl(224, 53%, 15%)
HSV	hsv(224, 69%, 23%)
CMYK	cmyk(69.5%, 50.8%, 0%, 76.9%)
CIE-LAB	lab(11.44, 6.54, -20.88)
CIE-LCH	lch(11.44, 21.88, 287.40°)
OKLab	oklab(23.88% -0.0034 -0.0595)
OKLCH	oklch(23.88% 0.06 266.7)
XYZ	xyz(1.4780, 1.3230, 4.3143)
Luminance	0.0132 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121D3B #3B3012

analogous

#12323B #121D3B #1B123B

triadic

#121D3B #3B121D #1D3B12

tetradic

#121D3B #3B1232 #3B3012 #123B1B

square

#121D3B #3B1232 #3B3012 #123B1B

split-complementary

#121D3B #3B1B12 #323B12

monochromatic

#070C17 #070C17 #121D3B #20346A #2F4B99

Accessibility & contrast

On white

16.61

#121D3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#121D3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121D3B

16.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121D3B	#FFFFFF	#000000	##FFFFFF
##121D3B	1.00	16.61	1.26	16.61
#FFFFFF	16.61	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F203C

Deuteranopia (green-blind)

#091D3A

Tritanopia (blue-blind)

#002429

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121d3b;
/* rgb */ color: rgb(18, 29, 59);
/* oklch */ color: oklch(23.9% 0.060 266.7);

Tailwind

colors: {
  custom: {
    50: '#545871',
    500: '#121d3b',
    950: '#000000',
  },
}

SCSS

$custom: #121d3b;
$custom-light: #545871;
$custom-dark: #000000;

JSON

{
  "hex": "#121d3b",
  "rgb": {
    "r": 18,
    "g": 29,
    "b": 59
  },
  "hsl": {
    "h": 223.902,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.2388,
    "c": 0.05962,
    "h": 266.7
  },
  "luminance": 0.01323
}

Semantic roles & 50–950 ramp

primary

#121D3B

secondary

#746335

accent

#B64BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #121D3B

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

Preview Lab → · Contrast checker → · Palette generator →