#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
RGBrgb(4, 36, 59)
HSLhsl(205, 87%, 12%)
HSVhsv(205, 93%, 23%)
CMYKcmyk(93.2%, 39%, 0%, 76.9%)
CIE-LABlab(13.25, -1.50, -18.04)
CIE-LCHlch(13.25, 18.10, 265.26°)
OKLaboklab(25.11% -0.0245 -0.0513)
OKLCHoklch(25.11% 0.057 244.5)
XYZxyz(1.4701, 1.6031, 4.3688)
Luminance0.0160 (WCAG relative)
Temperaturecool
Familycyan

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
##04243B1.0015.901.3215.90
#FFFFFF15.901.0021.001.00
#0000001.3221.001.0021.00
##FFFFFF15.901.0021.001.00

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 →

#04243B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva