#151B2B#151B2B

#151B2B is a very dark, muted blue. Relative luminance 0.011; OKLCH L 22.4% C 0.033 H 268.0°. Best body text is #FFFFFF at 17.16:1 contrast (WCAG AA passes).

Color values

HEX	#151B2B
RGB	rgb(21, 27, 43)
HSL	hsl(224, 34%, 13%)
HSV	hsv(224, 51%, 17%)
CMYK	cmyk(51.2%, 37.2%, 0%, 83.1%)
CIE-LAB	lab(9.94, 2.56, -11.68)
CIE-LCH	lch(9.94, 11.95, 282.38°)
OKLab	oklab(22.45% -0.0011 -0.0326)
OKLCH	oklch(22.45% 0.033 268)
XYZ	xyz(1.1371, 1.1177, 2.4408)
Luminance	0.0112 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B2B #2B2515

analogous

#15262B #151B2B #1A152B

triadic

#151B2B #2B151B #1B2B15

tetradic

#151B2B #2B1526 #2B2515 #152B1A

square

#151B2B #2B1526 #2B2515 #152B1A

split-complementary

#151B2B #2B1A15 #262B15

monochromatic

#0A0D15 #0A0D15 #151B2B #293554 #3D4F7D

Accessibility & contrast

On white

17.16

#151B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#151B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B2B

17.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B2B	#FFFFFF	#000000	##FFFFFF
##151B2B	1.00	17.16	1.22	17.16
#FFFFFF	17.16	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#151C2C

Deuteranopia (green-blind)

#131A2B

Tritanopia (blue-blind)

#0E1E21

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #151b2b;
/* rgb */ color: rgb(21, 27, 43);
/* oklch */ color: oklch(22.4% 0.033 268.0);

Tailwind

colors: {
  custom: {
    50: '#535764',
    500: '#151b2b',
    950: '#000000',
  },
}

SCSS

$custom: #151b2b;
$custom-light: #535764;
$custom-dark: #000000;

JSON

{
  "hex": "#151b2b",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 43
  },
  "hsl": {
    "h": 223.636,
    "s": 34.375,
    "l": 12.549
  },
  "oklch": {
    "l": 0.22445,
    "c": 0.03265,
    "h": 268
  },
  "luminance": 0.01118
}

Semantic roles & 50–950 ramp

primary

#151B2B

secondary

#61563B

accent

#AD5DCA

background

#F4F5F5

surface

#E7E9EA

border

#C3C5C6

text

#020305

muted

#787879

Preview Lab

Preview with #151B2B

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

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