#151B3D#151B3D

#151B3D is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.8% C 0.065 H 272.9°. Best body text is #FFFFFF at 16.72:1 contrast (WCAG AA passes).

Color values

HEX	#151B3D
RGB	rgb(21, 27, 61)
HSL	hsl(231, 49%, 16%)
HSV	hsv(231, 66%, 24%)
CMYK	cmyk(65.6%, 55.7%, 0%, 76.1%)
CIE-LAB	lab(11.14, 9.65, -22.77)
CIE-LCH	lch(11.14, 24.73, 292.96°)
OKLab	oklab(23.76% 0.0034 -0.065)
OKLCH	oklch(23.76% 0.065 272.9)
XYZ	xyz(1.5432, 1.2801, 4.5797)
Luminance	0.0128 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B3D #3D3715

analogous

#152F3D #151B3D #23153D

triadic

#151B3D #3D151B #1B3D15

tetradic

#151B3D #3D152F #3D3715 #153D23

square

#151B3D #3D152F #3D3715 #153D23

split-complementary

#151B3D #3D2315 #2F3D15

monochromatic

#080A17 #080A17 #151B3D #252F6B #344398

Accessibility & contrast

On white

16.72

#151B3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#151B3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B3D

16.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B3D	#FFFFFF	#000000	##FFFFFF
##151B3D	1.00	16.72	1.26	16.72
#FFFFFF	16.72	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A203E

Deuteranopia (green-blind)

#051C3C

Tritanopia (blue-blind)

#012329

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #151b3d;
/* rgb */ color: rgb(21, 27, 61);
/* oklch */ color: oklch(23.8% 0.065 272.9);

Tailwind

colors: {
  custom: {
    50: '#575773',
    500: '#151b3d',
    950: '#000000',
  },
}

SCSS

$custom: #151b3d;
$custom-light: #575773;
$custom-dark: #000000;

JSON

{
  "hex": "#151b3d",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 61
  },
  "hsl": {
    "h": 231,
    "s": 48.78,
    "l": 16.078
  },
  "oklch": {
    "l": 0.23757,
    "c": 0.0651,
    "h": 272.9
  },
  "luminance": 0.0128
}

Semantic roles & 50–950 ramp

primary

#151B3D

secondary

#756C39

accent

#C44FD8

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #151B3D

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

Preview Lab → · Contrast checker → · Palette generator →