#12303C#12303C

#12303C is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.2% C 0.042 H 227.1°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#12303C
RGB	rgb(18, 48, 60)
HSL	hsl(197, 54%, 15%)
HSV	hsv(197, 70%, 24%)
CMYK	cmyk(70%, 20%, 0%, 76.5%)
CIE-LAB	lab(18.23, -6.74, -10.94)
CIE-LCH	lch(18.23, 12.85, 238.36°)
OKLab	oklab(29.23% -0.0284 -0.0305)
OKLCH	oklch(29.23% 0.042 227.1)
XYZ	xyz(2.1217, 2.5685, 4.6581)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12303C #3C1E12

analogous

#123C33 #12303C #121B3C

triadic

#12303C #3C1230 #303C12

tetradic

#12303C #33123C #3C1E12 #1B3C12

square

#12303C #33123C #3C1E12 #1B3C12

split-complementary

#12303C #3C121B #3C3312

monochromatic

#071318 #071318 #12303C #20566B #2E7B9A

Accessibility & contrast

On white

13.87

#12303C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#12303C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12303C

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12303C	#FFFFFF	#000000	##FFFFFF
##12303C	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2F3D

Deuteranopia (green-blind)

#242B3C

Tritanopia (blue-blind)

#003334

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #12303c;
/* rgb */ color: rgb(18, 48, 60);
/* oklch */ color: oklch(29.2% 0.042 227.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#12303c",
  "rgb": {
    "r": 18,
    "g": 48,
    "b": 60
  },
  "hsl": {
    "h": 197.143,
    "s": 53.846,
    "l": 15.294
  },
  "oklch": {
    "l": 0.29227,
    "c": 0.04165,
    "h": 227.1
  },
  "luminance": 0.02569
}

Semantic roles & 50–950 ramp

primary

#12303C

secondary

#754735

accent

#744BDD

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030607

muted

#787A7A

Preview Lab

Preview with #12303C

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

Preview Lab → · Contrast checker → · Palette generator →