#042C3B#042C3B

#042C3B is a dark, muted cyan. Relative luminance 0.021; OKLCH L 27.5% C 0.050 H 228.5°. Best body text is #FFFFFF at 14.70:1 contrast (WCAG AA passes).

Color values

HEX	#042C3B
RGB	rgb(4, 44, 59)
HSL	hsl(196, 87%, 12%)
HSV	hsv(196, 93%, 23%)
CMYK	cmyk(93.2%, 25.4%, 0%, 76.9%)
CIE-LAB	lab(16.22, -7.10, -13.39)
CIE-LCH	lch(16.22, 15.15, 242.05°)
OKLab	oklab(27.47% -0.0334 -0.0377)
OKLCH	oklch(27.47% 0.05 228.5)
XYZ	xyz(1.7398, 2.1427, 4.4587)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042C3B #3B1304

analogous

#043B2F #042C3B #04103B

triadic

#042C3B #3B042C #2C3B04

tetradic

#042C3B #2F043B #3B1304 #103B04

square

#042C3B #2F043B #3B1304 #103B04

split-complementary

#042C3B #3B0410 #3B2F04

monochromatic

#02151D #02151D #042C3B #085774 #0C81AE

Accessibility & contrast

On white

14.70

#042C3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#042C3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042C3B

14.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042C3B	#FFFFFF	#000000	##FFFFFF
##042C3B	1.00	14.70	1.43	14.70
#FFFFFF	14.70	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#242B3C

Deuteranopia (green-blind)

#1D263B

Tritanopia (blue-blind)

#003031

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #042c3b;
/* rgb */ color: rgb(4, 44, 59);
/* oklch */ color: oklch(27.5% 0.050 228.5);

Tailwind

colors: {
  custom: {
    50: '#4f6571',
    500: '#042c3b',
    950: '#000000',
  },
}

SCSS

$custom: #042c3b;
$custom-light: #4f6571;
$custom-dark: #000000;

JSON

{
  "hex": "#042c3b",
  "rgb": {
    "r": 4,
    "g": 44,
    "b": 59
  },
  "hsl": {
    "h": 196.364,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.27469,
    "c": 0.05033,
    "h": 228.5
  },
  "luminance": 0.02143
}

Semantic roles & 50–950 ramp

primary

#042C3B

secondary

#7D381E

accent

#642AFD

background

#F4F6F6

surface

#E7EBEC

border

#C3C6C7

text

#020507

muted

#787A7A

Preview Lab

Preview with #042C3B

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

Preview Lab → · Contrast checker → · Palette generator →