#151B40#151B40

#151B40 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.0% C 0.070 H 273.0°. Best body text is #FFFFFF at 16.63:1 contrast (WCAG AA passes).

Color values

HEX	#151B40
RGB	rgb(21, 27, 64)
HSL	hsl(232, 51%, 17%)
HSV	hsv(232, 67%, 25%)
CMYK	cmyk(67.2%, 57.8%, 0%, 74.9%)
CIE-LAB	lab(11.37, 10.88, -24.52)
CIE-LCH	lch(11.37, 26.82, 293.92°)
OKLab	oklab(24.01% 0.0037 -0.0701)
OKLCH	oklch(24.01% 0.07 273)
XYZ	xyz(1.6263, 1.3133, 5.0173)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B40 #403A15

analogous

#153140 #151B40 #251540

triadic

#151B40 #40151B #1B4015

tetradic

#151B40 #401531 #403A15 #154025

square

#151B40 #401531 #403A15 #154025

split-complementary

#151B40 #402515 #314015

monochromatic

#080A17 #080A17 #151B40 #242E6E #33429C

Accessibility & contrast

On white

16.63

#151B40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#151B40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B40

16.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B40	#FFFFFF	#000000	##FFFFFF
##151B40	1.00	16.63	1.26	16.63
#FFFFFF	16.63	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#072041

Deuteranopia (green-blind)

#021C3F

Tritanopia (blue-blind)

#00232A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #151b40;
/* rgb */ color: rgb(21, 27, 64);
/* oklch */ color: oklch(24.0% 0.070 273.0);

Tailwind

colors: {
  custom: {
    50: '#575775',
    500: '#151b40',
    950: '#000000',
  },
}

SCSS

$custom: #151b40;
$custom-light: #575775;
$custom-dark: #000000;

JSON

{
  "hex": "#151b40",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 64
  },
  "hsl": {
    "h": 231.628,
    "s": 50.588,
    "l": 16.667
  },
  "oklch": {
    "l": 0.24008,
    "c": 0.07025,
    "h": 273
  },
  "luminance": 0.01313
}

Semantic roles & 50–950 ramp

primary

#151B40

secondary

#786F39

accent

#C64EDA

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #151B40

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

Preview Lab → · Contrast checker → · Palette generator →