#042A3F#042A3F

#042A3F is a dark, muted cyan. Relative luminance 0.020; OKLCH L 27.1% C 0.056 H 238.5°. Best body text is #FFFFFF at 14.91:1 contrast (WCAG AA passes).

Color values

HEX	#042A3F
RGB	rgb(4, 42, 63)
HSL	hsl(201, 88%, 13%)
HSV	hsv(201, 94%, 25%)
CMYK	cmyk(93.7%, 33.3%, 0%, 75.3%)
CIE-LAB	lab(15.70, -3.98, -16.98)
CIE-LCH	lch(15.70, 17.44, 256.82°)
OKLab	oklab(27.13% -0.0295 -0.0481)
OKLCH	oklch(27.13% 0.056 238.5)
XYZ	xyz(1.7749, 2.0404, 5.0020)
Luminance	0.0204 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042A3F #3F1904

analogous

#043F36 #042A3F #040C3F

triadic

#042A3F #3F042A #2A3F04

tetradic

#042A3F #36043F #3F1904 #0C3F04

square

#042A3F #36043F #3F1904 #0C3F04

split-complementary

#042A3F #3F040C #3F3604

monochromatic

#02131D #02131D #042A3F #085079 #0B77B2

Accessibility & contrast

On white

14.91

#042A3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#042A3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042A3F

14.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042A3F	#FFFFFF	#000000	##FFFFFF
##042A3F	1.00	14.91	1.41	14.91
#FFFFFF	14.91	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#202A40

Deuteranopia (green-blind)

#18253F

Tritanopia (blue-blind)

#002F31

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #042a3f;
/* rgb */ color: rgb(4, 42, 63);
/* oklch */ color: oklch(27.1% 0.056 238.5);

Tailwind

colors: {
  custom: {
    50: '#506374',
    500: '#042a3f',
    950: '#000000',
  },
}

SCSS

$custom: #042a3f;
$custom-light: #506374;
$custom-dark: #000000;

JSON

{
  "hex": "#042a3f",
  "rgb": {
    "r": 4,
    "g": 42,
    "b": 63
  },
  "hsl": {
    "h": 201.356,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.27126,
    "c": 0.05641,
    "h": 238.5
  },
  "luminance": 0.02041
}

Semantic roles & 50–950 ramp

primary

#042A3F

secondary

#80411E

accent

#752AFE

background

#F4F5F7

surface

#E7EAED

border

#C3C6C8

text

#020508

muted

#78797B

Preview Lab

Preview with #042A3F

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

Preview Lab → · Contrast checker → · Palette generator →