#12303B#12303B

#12303B is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.2% C 0.041 H 224.9°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#12303B
RGB	rgb(18, 48, 59)
HSL	hsl(196, 53%, 15%)
HSV	hsv(196, 69%, 23%)
CMYK	cmyk(69.5%, 18.6%, 0%, 76.9%)
CIE-LAB	lab(18.18, -7.12, -10.32)
CIE-LCH	lch(18.18, 12.54, 235.39°)
OKLab	oklab(29.17% -0.0288 -0.0287)
OKLCH	oklch(29.17% 0.041 224.9)
XYZ	xyz(2.0955, 2.5581, 4.5201)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12303B #3B1D12

analogous

#123B32 #12303B #121B3B

triadic

#12303B #3B1230 #303B12

tetradic

#12303B #32123B #3B1D12 #1B3B12

square

#12303B #32123B #3B1D12 #1B3B12

split-complementary

#12303B #3B121B #3B3212

monochromatic

#071317 #071317 #12303B #20566A #2F7C99

Accessibility & contrast

On white

13.89

#12303B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#12303B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12303B

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12303B	#FFFFFF	#000000	##FFFFFF
##12303B	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2F3C

Deuteranopia (green-blind)

#242A3B

Tritanopia (blue-blind)

#003334

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #12303b;
/* rgb */ color: rgb(18, 48, 59);
/* oklch */ color: oklch(29.2% 0.041 224.9);

Tailwind

colors: {
  custom: {
    50: '#556871',
    500: '#12303b',
    950: '#000000',
  },
}

SCSS

$custom: #12303b;
$custom-light: #556871;
$custom-dark: #000000;

JSON

{
  "hex": "#12303b",
  "rgb": {
    "r": 18,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 196.098,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.29174,
    "c": 0.04072,
    "h": 224.9
  },
  "luminance": 0.02558
}

Semantic roles & 50–950 ramp

primary

#12303B

secondary

#744635

accent

#724BDD

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030607

muted

#787A7A

Preview Lab

Preview with #12303B

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

Preview Lab → · Contrast checker → · Palette generator →