#151B3B#151B3B

#151B3B is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.6% C 0.062 H 272.8°. Best body text is #FFFFFF at 16.78:1 contrast (WCAG AA passes).

Color values

HEX	#151B3B
RGB	rgb(21, 27, 59)
HSL	hsl(231, 48%, 16%)
HSV	hsv(231, 64%, 23%)
CMYK	cmyk(64.4%, 54.2%, 0%, 76.9%)
CIE-LAB	lab(10.99, 8.83, -21.59)
CIE-LCH	lch(10.99, 23.32, 292.25°)
OKLab	oklab(23.59% 0.003 -0.0615)
OKLCH	oklch(23.59% 0.062 272.8)
XYZ	xyz(1.4904, 1.2590, 4.3013)
Luminance	0.0126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B3B #3B3515

analogous

#152E3B #151B3B #22153B

triadic

#151B3B #3B151B #1B3B15

tetradic

#151B3B #3B152E #3B3515 #153B22

square

#151B3B #3B152E #3B3515 #153B22

split-complementary

#151B3B #3B2215 #2E3B15

monochromatic

#080A17 #080A17 #151B3B #253068 #354495

Accessibility & contrast

On white

16.78

#151B3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#151B3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B3B

16.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B3B	#FFFFFF	#000000	##FFFFFF
##151B3B	1.00	16.78	1.25	16.78
#FFFFFF	16.78	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C1F3C

Deuteranopia (green-blind)

#071C3A

Tritanopia (blue-blind)

#022228

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #151b3b;
/* rgb */ color: rgb(21, 27, 59);
/* oklch */ color: oklch(23.6% 0.062 272.8);

Tailwind

colors: {
  custom: {
    50: '#565771',
    500: '#151b3b',
    950: '#000000',
  },
}

SCSS

$custom: #151b3b;
$custom-light: #565771;
$custom-dark: #000000;

JSON

{
  "hex": "#151b3b",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 59
  },
  "hsl": {
    "h": 230.526,
    "s": 47.5,
    "l": 15.686
  },
  "oklch": {
    "l": 0.23594,
    "c": 0.06162,
    "h": 272.8
  },
  "luminance": 0.01259
}

Semantic roles & 50–950 ramp

primary

#151B3B

secondary

#726939

accent

#C251D7

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #151B3B

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

Preview Lab → · Contrast checker → · Palette generator →