#04243A#04243A

#04243A is a dark, muted cyan. Relative luminance 0.016; OKLCH L 25.0% C 0.055 H 243.3°. Best body text is #FFFFFF at 15.93:1 contrast (WCAG AA passes).

Color values

HEX	#04243A
RGB	rgb(4, 36, 58)
HSL	hsl(204, 87%, 12%)
HSV	hsv(204, 93%, 23%)
CMYK	cmyk(93.1%, 37.9%, 0%, 77.3%)
CIE-LAB	lab(13.19, -1.96, -17.43)
CIE-LCH	lch(13.19, 17.54, 263.59°)
OKLab	oklab(25.04% -0.0249 -0.0495)
OKLCH	oklch(25.04% 0.055 243.3)
XYZ	xyz(1.4444, 1.5929, 4.2335)
Luminance	0.0159 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04243A #3A1A04

analogous

#043A35 #04243A #04093A

triadic

#04243A #3A0424 #243A04

tetradic

#04243A #35043A #3A1A04 #093A04

square

#04243A #35043A #3A1A04 #093A04

split-complementary

#04243A #3A0409 #3A3504

monochromatic

#02121D #02121D #04243A #084873 #0C6BAD

Accessibility & contrast

On white

15.93

#04243A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#04243A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04243A

15.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04243A	#FFFFFF	#000000	##FFFFFF
##04243A	1.00	15.93	1.32	15.93
#FFFFFF	15.93	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A253B

Deuteranopia (green-blind)

#12203A

Tritanopia (blue-blind)

#00292C

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #04243a;
/* rgb */ color: rgb(4, 36, 58);
/* oklch */ color: oklch(25.0% 0.055 243.3);

Tailwind

colors: {
  custom: {
    50: '#4e5e70',
    500: '#04243a',
    950: '#000000',
  },
}

SCSS

$custom: #04243a;
$custom-light: #4e5e70;
$custom-dark: #000000;

JSON

{
  "hex": "#04243a",
  "rgb": {
    "r": 4,
    "g": 36,
    "b": 58
  },
  "hsl": {
    "h": 204.444,
    "s": 87.097,
    "l": 12.157
  },
  "oklch": {
    "l": 0.25038,
    "c": 0.05545,
    "h": 243.3
  },
  "luminance": 0.01593
}

Semantic roles & 50–950 ramp

primary

#04243A

secondary

#7C441E

accent

#802BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #04243A

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

Preview Lab → · Contrast checker → · Palette generator →