#151B3C#151B3C

#151B3C is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.7% C 0.063 H 272.9°. Best body text is #FFFFFF at 16.75:1 contrast (WCAG AA passes).

Color values

HEX	#151B3C
RGB	rgb(21, 27, 60)
HSL	hsl(231, 48%, 16%)
HSV	hsv(231, 65%, 24%)
CMYK	cmyk(65%, 55%, 0%, 76.5%)
CIE-LAB	lab(11.06, 9.24, -22.18)
CIE-LCH	lch(11.06, 24.03, 292.61°)
OKLab	oklab(23.67% 0.0032 -0.0633)
OKLCH	oklch(23.67% 0.063 272.9)
XYZ	xyz(1.5165, 1.2694, 4.4392)
Luminance	0.0127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B3C #3C3615

analogous

#152E3C #151B3C #22153C

triadic

#151B3C #3C151B #1B3C15

tetradic

#151B3C #3C152E #3C3615 #153C22

square

#151B3C #3C152E #3C3615 #153C22

split-complementary

#151B3C #3C2215 #2E3C15

monochromatic

#080A17 #080A17 #151B3C #252F69 #354497

Accessibility & contrast

On white

16.75

#151B3C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#151B3C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B3C

16.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B3C	#FFFFFF	#000000	##FFFFFF
##151B3C	1.00	16.75	1.25	16.75
#FFFFFF	16.75	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B1F3D

Deuteranopia (green-blind)

#061C3B

Tritanopia (blue-blind)

#022228

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #151b3c;
/* rgb */ color: rgb(21, 27, 60);
/* oklch */ color: oklch(23.7% 0.063 272.9);

Tailwind

colors: {
  custom: {
    50: '#565772',
    500: '#151b3c',
    950: '#000000',
  },
}

SCSS

$custom: #151b3c;
$custom-light: #565772;
$custom-dark: #000000;

JSON

{
  "hex": "#151b3c",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 60
  },
  "hsl": {
    "h": 230.769,
    "s": 48.148,
    "l": 15.882
  },
  "oklch": {
    "l": 0.23675,
    "c": 0.06336,
    "h": 272.9
  },
  "luminance": 0.0127
}

Semantic roles & 50–950 ramp

primary

#151B3C

secondary

#746B39

accent

#C350D8

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #151B3C

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

Preview Lab → · Contrast checker → · Palette generator →