#10304D#10304D

#10304D is a dark, moderate cyan. Relative luminance 0.028; OKLCH L 30.2% C 0.065 H 248.9°. Best body text is #FFFFFF at 13.53:1 contrast (WCAG AA passes).

Color values

HEX	#10304D
RGB	rgb(16, 48, 77)
HSL	hsl(209, 66%, 18%)
HSV	hsv(209, 79%, 30%)
CMYK	cmyk(79.2%, 37.7%, 0%, 69.8%)
CIE-LAB	lab(19.05, -0.25, -21.23)
CIE-LCH	lch(19.05, 21.24, 269.31°)
OKLab	oklab(30.16% -0.0232 -0.0603)
OKLCH	oklch(30.16% 0.065 248.9)
XYZ	xyz(2.6097, 2.7596, 7.4149)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10304D #4D2D10

analogous

#104D4B #10304D #10114D

triadic

#10304D #4D1030 #304D10

tetradic

#10304D #4B104D #4D2D10 #114D10

square

#10304D #4B104D #4D2D10 #114D10

split-complementary

#10304D #4D1011 #4D4B10

monochromatic

#051019 #05101A #10304D #1B5080 #256FB2

Accessibility & contrast

On white

13.53

#10304D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#10304D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10304D

13.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10304D	#FFFFFF	#000000	##FFFFFF
##10304D	1.00	13.53	1.55	13.53
#FFFFFF	13.53	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23314E

Deuteranopia (green-blind)

#1A2C4C

Tritanopia (blue-blind)

#00373A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #10304d;
/* rgb */ color: rgb(16, 48, 77);
/* oklch */ color: oklch(30.2% 0.065 248.9);

Tailwind

colors: {
  custom: {
    50: '#58687f',
    500: '#10304d',
    950: '#000000',
  },
}

SCSS

$custom: #10304d;
$custom-light: #58687f;
$custom-dark: #000000;

JSON

{
  "hex": "#10304d",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 77
  },
  "hsl": {
    "h": 208.525,
    "s": 65.591,
    "l": 18.235
  },
  "oklch": {
    "l": 0.30159,
    "c": 0.06461,
    "h": 248.9
  },
  "luminance": 0.0276
}

Semantic roles & 50–950 ramp

primary

#10304D

secondary

#875A32

accent

#903FE9

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #10304D

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

Preview Lab → · Contrast checker → · Palette generator →