#04243F#04243F

#04243F is a dark, moderate cyan. Relative luminance 0.016; OKLCH L 25.4% C 0.063 H 248.3°. Best body text is #FFFFFF at 15.80:1 contrast (WCAG AA passes).

Color values

HEX	#04243F
RGB	rgb(4, 36, 63)
HSL	hsl(207, 88%, 13%)
HSV	hsv(207, 94%, 25%)
CMYK	cmyk(93.7%, 42.9%, 0%, 75.3%)
CIE-LAB	lab(13.51, 0.35, -20.44)
CIE-LCH	lch(13.51, 20.44, 271.00°)
OKLab	oklab(25.4% -0.0232 -0.0583)
OKLCH	oklch(25.4% 0.063 248.3)
XYZ	xyz(1.5778, 1.6462, 4.9363)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04243F #3F1F04

analogous

#043F3C #04243F #04063F

triadic

#04243F #3F0424 #243F04

tetradic

#04243F #3C043F #3F1F04 #063F04

square

#04243F #3C043F #3F1F04 #063F04

split-complementary

#04243F #3F0406 #3F3C04

monochromatic

#02101D #02101D #04243F #084579 #0B66B2

Accessibility & contrast

On white

15.80

#04243F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#04243F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04243F

15.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04243F	#FFFFFF	#000000	##FFFFFF
##04243F	1.00	15.80	1.33	15.80
#FFFFFF	15.80	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#172640

Deuteranopia (green-blind)

#0E203E

Tritanopia (blue-blind)

#002B2E

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #04243f;
/* rgb */ color: rgb(4, 36, 63);
/* oklch */ color: oklch(25.4% 0.063 248.3);

Tailwind

colors: {
  custom: {
    50: '#505e74',
    500: '#04243f',
    950: '#000000',
  },
}

SCSS

$custom: #04243f;
$custom-light: #505e74;
$custom-dark: #000000;

JSON

{
  "hex": "#04243f",
  "rgb": {
    "r": 4,
    "g": 36,
    "b": 63
  },
  "hsl": {
    "h": 207.458,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.25397,
    "c": 0.06277,
    "h": 248.3
  },
  "luminance": 0.01646
}

Semantic roles & 50–950 ramp

primary

#04243F

secondary

#804B1E

accent

#8B2AFE

background

#F4F5F7

surface

#E7E9ED

border

#C3C5C8

text

#020408

muted

#78797B

Preview Lab

Preview with #04243F

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

Preview Lab → · Contrast checker → · Palette generator →