#12183E#12183E

#12183E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.9% C 0.073 H 272.6°. Best body text is #FFFFFF at 17.13:1 contrast (WCAG AA passes).

Color values

HEX	#12183E
RGB	rgb(18, 24, 62)
HSL	hsl(232, 55%, 16%)
HSV	hsv(232, 71%, 24%)
CMYK	cmyk(71%, 61.3%, 0%, 75.7%)
CIE-LAB	lab(10.03, 11.69, -25.28)
CIE-LCH	lch(10.03, 27.85, 294.82°)
OKLab	oklab(22.89% 0.0033 -0.0725)
OKLCH	oklch(22.89% 0.073 272.6)
XYZ	xyz(1.4453, 1.1295, 4.6984)
Luminance	0.0113 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12183E #3E3812

analogous

#122E3E #12183E #22123E

triadic

#12183E #3E1218 #183E12

tetradic

#12183E #3E122E #3E3812 #123E22

square

#12183E #3E122E #3E3812 #123E22

split-complementary

#12183E #3E2212 #2E3E12

monochromatic

#070918 #070918 #12183E #202A6D #2E3D9D

Accessibility & contrast

On white

17.13

#12183E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#12183E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12183E

17.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12183E	#FFFFFF	#000000	##FFFFFF
##12183E	1.00	17.13	1.23	17.13
#FFFFFF	17.13	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021E3F

Deuteranopia (green-blind)

#001A3D

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #12183e;
/* rgb */ color: rgb(18, 24, 62);
/* oklch */ color: oklch(22.9% 0.073 272.6);

Tailwind

colors: {
  custom: {
    50: '#555473',
    500: '#12183e',
    950: '#000000',
  },
}

SCSS

$custom: #12183e;
$custom-light: #555473;
$custom-dark: #000000;

JSON

{
  "hex": "#12183e",
  "rgb": {
    "r": 18,
    "g": 24,
    "b": 62
  },
  "hsl": {
    "h": 231.818,
    "s": 55,
    "l": 15.686
  },
  "oklch": {
    "l": 0.22886,
    "c": 0.07259,
    "h": 272.6
  },
  "luminance": 0.0113
}

Semantic roles & 50–950 ramp

primary

#12183E

secondary

#776E35

accent

#CA49DE

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #12183E

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

Preview Lab → · Contrast checker → · Palette generator →