#04101B#04101B

#04101B is a very dark, muted cyan. Relative luminance 0.005; OKLCH L 16.7% C 0.030 H 245.4°. Best body text is #FFFFFF at 19.17:1 contrast (WCAG AA passes).

Color values

HEX	#04101B
RGB	rgb(4, 16, 27)
HSL	hsl(209, 74%, 6%)
HSV	hsv(209, 85%, 11%)
CMYK	cmyk(85.2%, 40.7%, 0%, 89.4%)
CIE-LAB	lab(4.30, -0.77, -8.32)
CIE-LCH	lch(4.30, 8.35, 264.70°)
OKLab	oklab(16.75% -0.0125 -0.0273)
OKLCH	oklch(16.75% 0.03 245.4)
XYZ	xyz(0.4331, 0.4755, 1.1056)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04101B #1B0F04

analogous

#041B1A #04101B #04041B

triadic

#04101B #1B0410 #101B04

tetradic

#04101B #1A041B #1B0F04 #041B04

square

#04101B #1A041B #1B0F04 #041B04

split-complementary

#04101B #1B0404 #1B1A04

monochromatic

#04101B #04101B #04101B #0C3050 #144F86

Accessibility & contrast

On white

19.17

#04101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#04101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04101B

19.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04101B	#FFFFFF	#000000	##FFFFFF
##04101B	1.00	19.17	1.10	19.17
#FFFFFF	19.17	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B101B

Deuteranopia (green-blind)

#080E1B

Tritanopia (blue-blind)

#001314

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #04101b;
/* rgb */ color: rgb(4, 16, 27);
/* oklch */ color: oklch(16.7% 0.030 245.4);

Tailwind

colors: {
  custom: {
    50: '#484e57',
    500: '#04101b',
    950: '#000000',
  },
}

SCSS

$custom: #04101b;
$custom-light: #484e57;
$custom-dark: #000000;

JSON

{
  "hex": "#04101b",
  "rgb": {
    "r": 4,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 208.696,
    "s": 74.194,
    "l": 6.078
  },
  "oklch": {
    "l": 0.16749,
    "c": 0.03002,
    "h": 245.4
  },
  "luminance": 0.00476
}

Semantic roles & 50–950 ramp

primary

#04101B

secondary

#5D3C1E

accent

#9037F1

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000103

muted

#777778

Preview Lab

Preview with #04101B

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

Preview Lab → · Contrast checker → · Palette generator →