#04283B#04283B

#04283B is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.3% C 0.053 H 237.0°. Best body text is #FFFFFF at 15.31:1 contrast (WCAG AA passes).

Color values

HEX	#04283B
RGB	rgb(4, 40, 59)
HSL	hsl(201, 87%, 12%)
HSV	hsv(201, 93%, 23%)
CMYK	cmyk(93.2%, 32.2%, 0%, 76.9%)
CIE-LAB	lab(14.73, -4.36, -15.71)
CIE-LCH	lch(14.73, 16.30, 254.48°)
OKLab	oklab(26.28% -0.0289 -0.0445)
OKLCH	oklch(26.28% 0.053 237)
XYZ	xyz(1.5980, 1.8590, 4.4114)
Luminance	0.0186 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04283B #3B1704

analogous

#043B33 #04283B #040D3B

triadic

#04283B #3B0428 #283B04

tetradic

#04283B #33043B #3B1704 #0D3B04

square

#04283B #33043B #3B1704 #0D3B04

split-complementary

#04283B #3B040D #3B3304

monochromatic

#02131D #02131D #04283B #084F74 #0C76AE

Accessibility & contrast

On white

15.31

#04283B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#04283B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04283B

15.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04283B	#FFFFFF	#000000	##FFFFFF
##04283B	1.00	15.31	1.37	15.31
#FFFFFF	15.31	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F283C

Deuteranopia (green-blind)

#17233B

Tritanopia (blue-blind)

#002D2F

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #04283b;
/* rgb */ color: rgb(4, 40, 59);
/* oklch */ color: oklch(26.3% 0.053 237.0);

Tailwind

colors: {
  custom: {
    50: '#4f6171',
    500: '#04283b',
    950: '#000000',
  },
}

SCSS

$custom: #04283b;
$custom-light: #4f6171;
$custom-dark: #000000;

JSON

{
  "hex": "#04283b",
  "rgb": {
    "r": 4,
    "g": 40,
    "b": 59
  },
  "hsl": {
    "h": 200.727,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.2628,
    "c": 0.05302,
    "h": 237
  },
  "luminance": 0.01859
}

Semantic roles & 50–950 ramp

primary

#04283B

secondary

#7D3F1E

accent

#732AFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #04283B

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

Preview Lab → · Contrast checker → · Palette generator →