#04273B#04273B

#04273B is a dark, muted cyan. Relative luminance 0.018; OKLCH L 26.0% C 0.054 H 239.0°. Best body text is #FFFFFF at 15.46:1 contrast (WCAG AA passes).

Color values

HEX	#04273B
RGB	rgb(4, 39, 59)
HSL	hsl(202, 87%, 12%)
HSV	hsv(202, 93%, 23%)
CMYK	cmyk(93.2%, 33.9%, 0%, 76.9%)
CIE-LAB	lab(14.36, -3.66, -16.29)
CIE-LCH	lch(14.36, 16.70, 257.35°)
OKLab	oklab(25.99% -0.0278 -0.0462)
OKLCH	oklch(25.99% 0.054 239)
XYZ	xyz(1.5647, 1.7924, 4.4003)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04273B #3B1804

analogous

#043B34 #04273B #040C3B

triadic

#04273B #3B0427 #273B04

tetradic

#04273B #34043B #3B1804 #0C3B04

square

#04273B #34043B #3B1804 #0C3B04

split-complementary

#04273B #3B040C #3B3404

monochromatic

#02131D #02131D #04273B #084D74 #0C73AE

Accessibility & contrast

On white

15.46

#04273B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#04273B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04273B

15.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04273B	#FFFFFF	#000000	##FFFFFF
##04273B	1.00	15.46	1.36	15.46
#FFFFFF	15.46	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D273C

Deuteranopia (green-blind)

#16223B

Tritanopia (blue-blind)

#002C2E

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #04273b;
/* rgb */ color: rgb(4, 39, 59);
/* oklch */ color: oklch(26.0% 0.054 239.0);

Tailwind

colors: {
  custom: {
    50: '#4f6071',
    500: '#04273b',
    950: '#000000',
  },
}

SCSS

$custom: #04273b;
$custom-light: #4f6071;
$custom-dark: #000000;

JSON

{
  "hex": "#04273b",
  "rgb": {
    "r": 4,
    "g": 39,
    "b": 59
  },
  "hsl": {
    "h": 201.818,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.25985,
    "c": 0.05388,
    "h": 239
  },
  "luminance": 0.01793
}

Semantic roles & 50–950 ramp

primary

#04273B

secondary

#7D401E

accent

#772AFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #04273B

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

Preview Lab → · Contrast checker → · Palette generator →