#042F3F#042F3F

#042F3F is a dark, muted cyan. Relative luminance 0.024; OKLCH L 28.6% C 0.053 H 228.6°. Best body text is #FFFFFF at 14.15:1 contrast (WCAG AA passes).

Color values

HEX	#042F3F
RGB	rgb(4, 47, 63)
HSL	hsl(196, 88%, 13%)
HSV	hsv(196, 94%, 25%)
CMYK	cmyk(93.7%, 25.4%, 0%, 75.3%)
CIE-LAB	lab(17.54, -7.38, -14.10)
CIE-LCH	lch(17.54, 15.91, 242.36°)
OKLab	oklab(28.6% -0.035 -0.0397)
OKLCH	oklch(28.6% 0.053 228.6)
XYZ	xyz(1.9634, 2.4175, 5.0648)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042F3F #3F1404

analogous

#043F31 #042F3F #04113F

triadic

#042F3F #3F042F #2F3F04

tetradic

#042F3F #31043F #3F1404 #113F04

square

#042F3F #31043F #3F1404 #113F04

split-complementary

#042F3F #3F0411 #3F3104

monochromatic

#02151D #02151D #042F3F #085A79 #0B85B2

Accessibility & contrast

On white

14.15

#042F3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#042F3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042F3F

14.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042F3F	#FFFFFF	#000000	##FFFFFF
##042F3F	1.00	14.15	1.48	14.15
#FFFFFF	14.15	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#272E40

Deuteranopia (green-blind)

#1F293F

Tritanopia (blue-blind)

#003334

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #042f3f;
/* rgb */ color: rgb(4, 47, 63);
/* oklch */ color: oklch(28.6% 0.053 228.6);

Tailwind

colors: {
  custom: {
    50: '#506774',
    500: '#042f3f',
    950: '#000000',
  },
}

SCSS

$custom: #042f3f;
$custom-light: #506774;
$custom-dark: #000000;

JSON

{
  "hex": "#042f3f",
  "rgb": {
    "r": 4,
    "g": 47,
    "b": 63
  },
  "hsl": {
    "h": 196.271,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.28596,
    "c": 0.0529,
    "h": 228.6
  },
  "luminance": 0.02418
}

Semantic roles & 50–950 ramp

primary

#042F3F

secondary

#80391E

accent

#632AFE

background

#F4F6F7

surface

#E7EBED

border

#C3C6C8

text

#020608

muted

#787A7B

Preview Lab

Preview with #042F3F

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

Preview Lab → · Contrast checker → · Palette generator →