#151B51#151B51

#151B51 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.6% C 0.098 H 272.5°. Best body text is #FFFFFF at 16.06:1 contrast (WCAG AA passes).

Color values

HEX	#151B51
RGB	rgb(21, 27, 81)
HSL	hsl(234, 59%, 20%)
HSV	hsv(234, 74%, 32%)
CMYK	cmyk(74.1%, 66.7%, 0%, 68.2%)
CIE-LAB	lab(12.84, 17.87, -33.91)
CIE-LCH	lch(12.84, 38.33, 297.78°)
OKLab	oklab(25.57% 0.0043 -0.0978)
OKLCH	oklch(25.57% 0.098 272.5)
XYZ	xyz(2.1859, 1.5372, 7.9645)
Luminance	0.0154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B51 #514B15

analogous

#153951 #151B51 #2D1551

triadic

#151B51 #51151B #1B5115

tetradic

#151B51 #511539 #514B15 #15512D

square

#151B51 #511539 #514B15 #15512D

split-complementary

#151B51 #512D15 #395115

monochromatic

#060818 #080B20 #151B51 #222B82 #2E3BB2

Accessibility & contrast

On white

16.06

#151B51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#151B51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B51

16.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B51	#FFFFFF	#000000	##FFFFFF
##151B51	1.00	16.06	1.31	16.06
#FFFFFF	16.06	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002453

Deuteranopia (green-blind)

#001F50

Tritanopia (blue-blind)

#002933

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #151b51;
/* rgb */ color: rgb(21, 27, 81);
/* oklch */ color: oklch(25.6% 0.098 272.5);

Tailwind

colors: {
  custom: {
    50: '#5c5782',
    500: '#151b51',
    950: '#000000',
  },
}

SCSS

$custom: #151b51;
$custom-light: #5c5782;
$custom-dark: #000000;

JSON

{
  "hex": "#151b51",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 81
  },
  "hsl": {
    "h": 234,
    "s": 58.824,
    "l": 20
  },
  "oklch": {
    "l": 0.25574,
    "c": 0.09789,
    "h": 272.5
  },
  "luminance": 0.01537
}

Semantic roles & 50–950 ramp

primary

#151B51

secondary

#898139

accent

#D246E2

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #151B51

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

Preview Lab → · Contrast checker → · Palette generator →