#151C2B#151C2B

#151C2B is a very dark, muted blue. Relative luminance 0.012; OKLCH L 22.7% C 0.031 H 264.8°. Best body text is #FFFFFF at 17.03:1 contrast (WCAG AA passes).

Color values

HEX	#151C2B
RGB	rgb(21, 28, 43)
HSL	hsl(221, 34%, 13%)
HSV	hsv(221, 51%, 17%)
CMYK	cmyk(51.2%, 34.9%, 0%, 83.1%)
CIE-LAB	lab(10.29, 1.81, -11.12)
CIE-LCH	lch(10.29, 11.27, 279.22°)
OKLab	oklab(22.72% -0.0028 -0.031)
OKLCH	oklch(22.72% 0.031 264.8)
XYZ	xyz(1.1604, 1.1643, 2.4486)
Luminance	0.0116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151C2B #2B2415

analogous

#15272B #151C2B #19152B

triadic

#151C2B #2B151C #1C2B15

tetradic

#151C2B #2B1527 #2B2415 #152B19

square

#151C2B #2B1527 #2B2415 #152B19

split-complementary

#151C2B #2B1915 #272B15

monochromatic

#0A0D15 #0A0D15 #151C2B #293754 #3D527D

Accessibility & contrast

On white

17.03

#151C2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#151C2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151C2B

17.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151C2B	#FFFFFF	#000000	##FFFFFF
##151C2B	1.00	17.03	1.23	17.03
#FFFFFF	17.03	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#171D2C

Deuteranopia (green-blind)

#141B2B

Tritanopia (blue-blind)

#0D1F21

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #151c2b;
/* rgb */ color: rgb(21, 28, 43);
/* oklch */ color: oklch(22.7% 0.031 264.8);

Tailwind

colors: {
  custom: {
    50: '#535764',
    500: '#151c2b',
    950: '#000000',
  },
}

SCSS

$custom: #151c2b;
$custom-light: #535764;
$custom-dark: #000000;

JSON

{
  "hex": "#151c2b",
  "rgb": {
    "r": 21,
    "g": 28,
    "b": 43
  },
  "hsl": {
    "h": 220.909,
    "s": 34.375,
    "l": 12.549
  },
  "oklch": {
    "l": 0.22722,
    "c": 0.03116,
    "h": 264.8
  },
  "luminance": 0.01164
}

Semantic roles & 50–950 ramp

primary

#151C2B

secondary

#61553B

accent

#A85DCA

background

#F4F5F5

surface

#E7E9EA

border

#C3C5C6

text

#020305

muted

#787879

Preview Lab

Preview with #151C2B

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

Preview Lab → · Contrast checker → · Palette generator →