#04151B#04151B

#04151B is a very dark, muted cyan. Relative luminance 0.006; OKLCH L 18.4% C 0.027 H 222.5°. Best body text is #FFFFFF at 18.61:1 contrast (WCAG AA passes).

Color values

HEX	#04151B
RGB	rgb(4, 21, 27)
HSL	hsl(196, 74%, 6%)
HSV	hsv(196, 85%, 11%)
CMYK	cmyk(85.2%, 22.2%, 0%, 89.4%)
CIE-LAB	lab(5.79, -3.83, -6.10)
CIE-LCH	lch(5.79, 7.20, 237.87°)
OKLab	oklab(18.38% -0.0198 -0.0181)
OKLCH	oklch(18.38% 0.027 222.5)
XYZ	xyz(0.5160, 0.6412, 1.1333)
Luminance	0.0064 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04151B #1B0A04

analogous

#041B15 #04151B #04091B

triadic

#04151B #1B0415 #151B04

tetradic

#04151B #15041B #1B0A04 #091B04

square

#04151B #15041B #1B0A04 #091B04

split-complementary

#04151B #1B0409 #1B1504

monochromatic

#04151B #04151B #04151B #0C3E50 #146886

Accessibility & contrast

On white

18.61

#04151B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#04151B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04151B

18.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04151B	#FFFFFF	#000000	##FFFFFF
##04151B	1.00	18.61	1.13	18.61
#FFFFFF	18.61	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12141B

Deuteranopia (green-blind)

#0E121B

Tritanopia (blue-blind)

#001717

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #04151b;
/* rgb */ color: rgb(4, 21, 27);
/* oklch */ color: oklch(18.4% 0.027 222.5);

Tailwind

colors: {
  custom: {
    50: '#485257',
    500: '#04151b',
    950: '#000000',
  },
}

SCSS

$custom: #04151b;
$custom-light: #485257;
$custom-dark: #000000;

JSON

{
  "hex": "#04151b",
  "rgb": {
    "r": 4,
    "g": 21,
    "b": 27
  },
  "hsl": {
    "h": 195.652,
    "s": 74.194,
    "l": 6.078
  },
  "oklch": {
    "l": 0.18375,
    "c": 0.02687,
    "h": 222.5
  },
  "luminance": 0.00641
}

Semantic roles & 50–950 ramp

primary

#04151B

secondary

#5D2E1E

accent

#6737F1

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000203

muted

#777878

Preview Lab

Preview with #04151B

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

Preview Lab → · Contrast checker → · Palette generator →