#042A3B#042A3B

#042A3B is a dark, muted cyan. Relative luminance 0.020; OKLCH L 26.9% C 0.052 H 232.8°. Best body text is #FFFFFF at 15.00:1 contrast (WCAG AA passes).

Color values

HEX	#042A3B
RGB	rgb(4, 42, 59)
HSL	hsl(199, 87%, 12%)
HSV	hsv(199, 93%, 23%)
CMYK	cmyk(93.2%, 28.8%, 0%, 76.9%)
CIE-LAB	lab(15.47, -5.75, -14.55)
CIE-LCH	lch(15.47, 15.64, 248.44°)
OKLab	oklab(26.87% -0.0311 -0.0411)
OKLCH	oklch(26.87% 0.052 232.8)
XYZ	xyz(1.6671, 1.9973, 4.4345)
Luminance	0.0200 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042A3B #3B1504

analogous

#043B30 #042A3B #040F3B

triadic

#042A3B #3B042A #2A3B04

tetradic

#042A3B #30043B #3B1504 #0F3B04

square

#042A3B #30043B #3B1504 #0F3B04

split-complementary

#042A3B #3B040F #3B3004

monochromatic

#02141D #02141D #042A3B #085374 #0C7CAE

Accessibility & contrast

On white

15.00

#042A3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#042A3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042A3B

15.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042A3B	#FFFFFF	#000000	##FFFFFF
##042A3B	1.00	15.00	1.40	15.00
#FFFFFF	15.00	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#212A3C

Deuteranopia (green-blind)

#1A243B

Tritanopia (blue-blind)

#002F30

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #042a3b;
/* rgb */ color: rgb(4, 42, 59);
/* oklch */ color: oklch(26.9% 0.052 232.8);

Tailwind

colors: {
  custom: {
    50: '#4f6371',
    500: '#042a3b',
    950: '#000000',
  },
}

SCSS

$custom: #042a3b;
$custom-light: #4f6371;
$custom-dark: #000000;

JSON

{
  "hex": "#042a3b",
  "rgb": {
    "r": 4,
    "g": 42,
    "b": 59
  },
  "hsl": {
    "h": 198.545,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.26873,
    "c": 0.05151,
    "h": 232.8
  },
  "luminance": 0.01998
}

Semantic roles & 50–950 ramp

primary

#042A3B

secondary

#7D3B1E

accent

#6C2AFD

background

#F4F5F6

surface

#E7EAEC

border

#C3C6C7

text

#020507

muted

#78797A

Preview Lab

Preview with #042A3B

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

Preview Lab → · Contrast checker → · Palette generator →