#042B3B#042B3B

#042B3B is a dark, muted cyan. Relative luminance 0.021; OKLCH L 27.2% C 0.051 H 230.7°. Best body text is #FFFFFF at 14.85:1 contrast (WCAG AA passes).

Color values

HEX	#042B3B
RGB	rgb(4, 43, 59)
HSL	hsl(197, 87%, 12%)
HSV	hsv(197, 93%, 23%)
CMYK	cmyk(93.2%, 27.1%, 0%, 76.9%)
CIE-LAB	lab(15.85, -6.43, -13.97)
CIE-LCH	lch(15.85, 15.38, 245.28°)
OKLab	oklab(27.17% -0.0322 -0.0394)
OKLCH	oklch(27.17% 0.051 230.7)
XYZ	xyz(1.7030, 2.0691, 4.4464)
Luminance	0.0207 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042B3B #3B1404

analogous

#043B30 #042B3B #040F3B

triadic

#042B3B #3B042B #2B3B04

tetradic

#042B3B #30043B #3B1404 #0F3B04

square

#042B3B #30043B #3B1404 #0F3B04

split-complementary

#042B3B #3B040F #3B3004

monochromatic

#02151D #02151D #042B3B #085574 #0C7FAE

Accessibility & contrast

On white

14.85

#042B3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#042B3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042B3B

14.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042B3B	#FFFFFF	#000000	##FFFFFF
##042B3B	1.00	14.85	1.41	14.85
#FFFFFF	14.85	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#232A3C

Deuteranopia (green-blind)

#1B253B

Tritanopia (blue-blind)

#002F30

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #042b3b;
/* rgb */ color: rgb(4, 43, 59);
/* oklch */ color: oklch(27.2% 0.051 230.7);

Tailwind

colors: {
  custom: {
    50: '#4f6471',
    500: '#042b3b',
    950: '#000000',
  },
}

SCSS

$custom: #042b3b;
$custom-light: #4f6471;
$custom-dark: #000000;

JSON

{
  "hex": "#042b3b",
  "rgb": {
    "r": 4,
    "g": 43,
    "b": 59
  },
  "hsl": {
    "h": 197.455,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.27171,
    "c": 0.05088,
    "h": 230.7
  },
  "luminance": 0.02069
}

Semantic roles & 50–950 ramp

primary

#042B3B

secondary

#7D3A1E

accent

#682AFD

background

#F4F5F6

surface

#E7EAEC

border

#C3C6C7

text

#020507

muted

#78797A

Preview Lab

Preview with #042B3B

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

Preview Lab → · Contrast checker → · Palette generator →