#04313B#04313B

#04313B is a dark, muted cyan. Relative luminance 0.025; OKLCH L 29.0% C 0.049 H 216.9°. Best body text is #FFFFFF at 13.93:1 contrast (WCAG AA passes).

Color values

HEX	#04313B
RGB	rgb(4, 49, 59)
HSL	hsl(191, 87%, 12%)
HSV	hsv(191, 93%, 23%)
CMYK	cmyk(93.2%, 16.9%, 0%, 76.9%)
CIE-LAB	lab(18.09, -10.35, -10.50)
CIE-LCH	lch(18.09, 14.74, 225.40°)
OKLab	oklab(28.97% -0.0391 -0.0294)
OKLCH	oklch(28.97% 0.049 216.9)
XYZ	xyz(1.9375, 2.5380, 4.5246)
Luminance	0.0254 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04313B #3B0E04

analogous

#043B2A #04313B #04163B

triadic

#04313B #3B0431 #313B04

tetradic

#04313B #2A043B #3B0E04 #163B04

square

#04313B #2A043B #3B0E04 #163B04

split-complementary

#04313B #3B0416 #3B2A04

monochromatic

#02181D #02181D #04313B #086174 #0C90AE

Accessibility & contrast

On white

13.93

#04313B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#04313B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04313B

13.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04313B	#FFFFFF	#000000	##FFFFFF
##04313B	1.00	13.93	1.51	13.93
#FFFFFF	13.93	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2F3C

Deuteranopia (green-blind)

#232A3B

Tritanopia (blue-blind)

#003434

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #04313b;
/* rgb */ color: rgb(4, 49, 59);
/* oklch */ color: oklch(29.0% 0.049 216.9);

Tailwind

colors: {
  custom: {
    50: '#506971',
    500: '#04313b',
    950: '#000000',
  },
}

SCSS

$custom: #04313b;
$custom-light: #506971;
$custom-dark: #000000;

JSON

{
  "hex": "#04313b",
  "rgb": {
    "r": 4,
    "g": 49,
    "b": 59
  },
  "hsl": {
    "h": 190.909,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.28972,
    "c": 0.04891,
    "h": 216.9
  },
  "luminance": 0.02538
}

Semantic roles & 50–950 ramp

primary

#04313B

secondary

#7D2F1E

accent

#512AFD

background

#F4F6F6

surface

#E7EBEC

border

#C3C6C7

text

#020607

muted

#787A7A

Preview Lab

Preview with #04313B

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

Preview Lab → · Contrast checker → · Palette generator →