#10303D#10303D

#10303D is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.2% C 0.044 H 227.9°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#10303D
RGB	rgb(16, 48, 61)
HSL	hsl(197, 58%, 15%)
HSV	hsv(197, 74%, 24%)
CMYK	cmyk(73.8%, 21.3%, 0%, 76.1%)
CIE-LAB	lab(18.19, -6.79, -11.69)
CIE-LCH	lch(18.19, 13.52, 239.82°)
OKLab	oklab(29.19% -0.0295 -0.0327)
OKLCH	oklch(29.19% 0.044 227.9)
XYZ	xyz(2.1126, 2.5608, 4.7969)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10303D #3D1D10

analogous

#103D33 #10303D #101A3D

triadic

#10303D #3D1030 #303D10

tetradic

#10303D #33103D #3D1D10 #1A3D10

square

#10303D #33103D #3D1D10 #1A3D10

split-complementary

#10303D #3D101A #3D3310

monochromatic

#061318 #061318 #10303D #1D566D #297C9E

Accessibility & contrast

On white

13.89

#10303D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#10303D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10303D

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10303D	#FFFFFF	#000000	##FFFFFF
##10303D	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)

#292F3E

Deuteranopia (green-blind)

#232A3D

Tritanopia (blue-blind)

#003434

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #10303d;
/* rgb */ color: rgb(16, 48, 61);
/* oklch */ color: oklch(29.2% 0.044 227.9);

Tailwind

colors: {
  custom: {
    50: '#546872',
    500: '#10303d',
    950: '#000000',
  },
}

SCSS

$custom: #10303d;
$custom-light: #546872;
$custom-dark: #000000;

JSON

{
  "hex": "#10303d",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 61
  },
  "hsl": {
    "h": 197.333,
    "s": 58.442,
    "l": 15.098
  },
  "oklch": {
    "l": 0.29192,
    "c": 0.044,
    "h": 227.9
  },
  "luminance": 0.02561
}

Semantic roles & 50–950 ramp

primary

#10303D

secondary

#774632

accent

#7346E2

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030608

muted

#787A7B

Preview Lab

Preview with #10303D

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

Preview Lab → · Contrast checker → · Palette generator →