#042840#042840

#042840 is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.6% C 0.060 H 243.2°. Best body text is #FFFFFF at 15.19:1 contrast (WCAG AA passes).

Color values

HEX	#042840
RGB	rgb(4, 40, 64)
HSL	hsl(204, 88%, 13%)
HSV	hsv(204, 94%, 25%)
CMYK	cmyk(93.8%, 37.5%, 0%, 74.9%)
CIE-LAB	lab(15.03, -2.11, -18.73)
CIE-LCH	lch(15.03, 18.85, 263.58°)
OKLab	oklab(26.61% -0.0269 -0.0533)
OKLCH	oklch(26.61% 0.06 243.2)
XYZ	xyz(1.7339, 1.9133, 5.1274)
Luminance	0.0191 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042840 #401C04

analogous

#04403A #042840 #040A40

triadic

#042840 #400428 #284004

tetradic

#042840 #3A0440 #401C04 #0A4004

square

#042840 #3A0440 #401C04 #0A4004

split-complementary

#042840 #40040A #403A04

monochromatic

#02121D #02121D #042840 #084C7A #0B70B3

Accessibility & contrast

On white

15.19

#042840 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#042840 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042840

15.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042840	#FFFFFF	#000000	##FFFFFF
##042840	1.00	15.19	1.38	15.19
#FFFFFF	15.19	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D2941

Deuteranopia (green-blind)

#142340

Tritanopia (blue-blind)

#002E31

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #042840;
/* rgb */ color: rgb(4, 40, 64);
/* oklch */ color: oklch(26.6% 0.060 243.2);

Tailwind

colors: {
  custom: {
    50: '#506175',
    500: '#042840',
    950: '#000000',
  },
}

SCSS

$custom: #042840;
$custom-light: #506175;
$custom-dark: #000000;

JSON

{
  "hex": "#042840",
  "rgb": {
    "r": 4,
    "g": 40,
    "b": 64
  },
  "hsl": {
    "h": 204,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.26613,
    "c": 0.05969,
    "h": 243.2
  },
  "luminance": 0.01914
}

Semantic roles & 50–950 ramp

primary

#042840

secondary

#81461F

accent

#7F29FE

background

#F4F5F7

surface

#E7E9ED

border

#C3C5C8

text

#020508

muted

#78797B

Preview Lab

Preview with #042840

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

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