#151B4C#151B4C

#151B4C is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.1% C 0.090 H 272.8°. Best body text is #FFFFFF at 16.24:1 contrast (WCAG AA passes).

Color values

HEX	#151B4C
RGB	rgb(21, 27, 76)
HSL	hsl(233, 57%, 19%)
HSV	hsv(233, 72%, 30%)
CMYK	cmyk(72.4%, 64.5%, 0%, 70.2%)
CIE-LAB	lab(12.38, 15.82, -31.23)
CIE-LCH	lch(12.38, 35.01, 296.86°)
OKLab	oklab(25.09% 0.0044 -0.0899)
OKLCH	oklch(25.09% 0.09 272.8)
XYZ	xyz(2.0053, 1.4649, 7.0132)
Luminance	0.0146 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B4C #4C4615

analogous

#15374C #151B4C #2B154C

triadic

#151B4C #4C151B #1B4C15

tetradic

#151B4C #4C1537 #4C4615 #154C2B

square

#151B4C #4C1537 #4C4615 #154C2B

split-complementary

#151B4C #4C2B15 #374C15

monochromatic

#070918 #080A1C #151B4C #222C7C #2F3DAC

Accessibility & contrast

On white

16.24

#151B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#151B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B4C

16.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B4C	#FFFFFF	#000000	##FFFFFF
##151B4C	1.00	16.24	1.29	16.24
#FFFFFF	16.24	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234E

Deuteranopia (green-blind)

#001E4B

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #151b4c;
/* rgb */ color: rgb(21, 27, 76);
/* oklch */ color: oklch(25.1% 0.090 272.8);

Tailwind

colors: {
  custom: {
    50: '#5a577e',
    500: '#151b4c',
    950: '#000000',
  },
}

SCSS

$custom: #151b4c;
$custom-light: #5a577e;
$custom-dark: #000000;

JSON

{
  "hex": "#151b4c",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 76
  },
  "hsl": {
    "h": 233.455,
    "s": 56.701,
    "l": 19.02
  },
  "oklch": {
    "l": 0.2509,
    "c": 0.09002,
    "h": 272.8
  },
  "luminance": 0.01465
}

Semantic roles & 50–950 ramp

primary

#151B4C

secondary

#847C39

accent

#CF48E0

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #151B4C

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

Preview Lab → · Contrast checker → · Palette generator →