#151F3B#151F3B

#151F3B is a very dark, muted blue. Relative luminance 0.015; OKLCH L 24.6% C 0.055 H 267.5°. Best body text is #FFFFFF at 16.27:1 contrast (WCAG AA passes).

Color values

HEX	#151F3B
RGB	rgb(21, 31, 59)
HSL	hsl(224, 48%, 16%)
HSV	hsv(224, 64%, 23%)
CMYK	cmyk(64.4%, 47.5%, 0%, 76.9%)
CIE-LAB	lab(12.32, 5.77, -19.46)
CIE-LCH	lch(12.32, 20.30, 286.51°)
OKLab	oklab(24.62% -0.0025 -0.0552)
OKLCH	oklch(24.62% 0.055 267.5)
XYZ	xyz(1.5884, 1.4550, 4.3340)
Luminance	0.0146 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151F3B #3B3115

analogous

#15323B #151F3B #1E153B

triadic

#151F3B #3B151F #1F3B15

tetradic

#151F3B #3B1532 #3B3115 #153B1E

square

#151F3B #3B1532 #3B3115 #153B1E

split-complementary

#151F3B #3B1E15 #323B15

monochromatic

#080C17 #080C17 #151F3B #253768 #354E95

Accessibility & contrast

On white

16.27

#151F3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#151F3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151F3B

16.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151F3B	#FFFFFF	#000000	##FFFFFF
##151F3B	1.00	16.27	1.29	16.27
#FFFFFF	16.27	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13223C

Deuteranopia (green-blind)

#0E1F3A

Tritanopia (blue-blind)

#02252A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #151f3b;
/* rgb */ color: rgb(21, 31, 59);
/* oklch */ color: oklch(24.6% 0.055 267.5);

Tailwind

colors: {
  custom: {
    50: '#565a71',
    500: '#151f3b',
    950: '#000000',
  },
}

SCSS

$custom: #151f3b;
$custom-light: #565a71;
$custom-dark: #000000;

JSON

{
  "hex": "#151f3b",
  "rgb": {
    "r": 21,
    "g": 31,
    "b": 59
  },
  "hsl": {
    "h": 224.211,
    "s": 47.5,
    "l": 15.686
  },
  "oklch": {
    "l": 0.24615,
    "c": 0.0553,
    "h": 267.5
  },
  "luminance": 0.01455
}

Semantic roles & 50–950 ramp

primary

#151F3B

secondary

#726339

accent

#B451D7

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #151F3B

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

Preview Lab → · Contrast checker → · Palette generator →