#04243B#04243B

#04243B is a dark, muted cyan. Relative luminance 0.016; OKLCH L 25.1% C 0.057 H 244.5°. Best body text is #FFFFFF at 15.90:1 contrast (WCAG AA passes).

Color values

HEX	#04243B
RGB	rgb(4, 36, 59)
HSL	hsl(205, 87%, 12%)
HSV	hsv(205, 93%, 23%)
CMYK	cmyk(93.2%, 39%, 0%, 76.9%)
CIE-LAB	lab(13.25, -1.50, -18.04)
CIE-LCH	lch(13.25, 18.10, 265.26°)
OKLab	oklab(25.11% -0.0245 -0.0513)
OKLCH	oklch(25.11% 0.057 244.5)
XYZ	xyz(1.4701, 1.6031, 4.3688)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04243B #3B1B04

analogous

#043B37 #04243B #04083B

triadic

#04243B #3B0424 #243B04

tetradic

#04243B #37043B #3B1B04 #083B04

square

#04243B #37043B #3B1B04 #083B04

split-complementary

#04243B #3B0408 #3B3704

monochromatic

#02111D #02111D #04243B #084774 #0C6AAE

Accessibility & contrast

On white

15.90

#04243B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#04243B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04243B

15.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04243B	#FFFFFF	#000000	##FFFFFF
##04243B	1.00	15.90	1.32	15.90
#FFFFFF	15.90	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19253C

Deuteranopia (green-blind)

#11203B

Tritanopia (blue-blind)

#002A2C

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #04243b;
/* rgb */ color: rgb(4, 36, 59);
/* oklch */ color: oklch(25.1% 0.057 244.5);

Tailwind

colors: {
  custom: {
    50: '#4f5e71',
    500: '#04243b',
    950: '#000000',
  },
}

SCSS

$custom: #04243b;
$custom-light: #4f5e71;
$custom-dark: #000000;

JSON

{
  "hex": "#04243b",
  "rgb": {
    "r": 4,
    "g": 36,
    "b": 59
  },
  "hsl": {
    "h": 205.091,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.25108,
    "c": 0.05688,
    "h": 244.5
  },
  "luminance": 0.01603
}

Semantic roles & 50–950 ramp

primary

#04243B

secondary

#7D461E

accent

#832AFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #04243B

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

Preview Lab → · Contrast checker → · Palette generator →