#151D4C#151D4C

#151D4C is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.5% C 0.087 H 271.5°. Best body text is #FFFFFF at 16.01:1 contrast (WCAG AA passes).

Color values

HEX	#151D4C
RGB	rgb(21, 29, 76)
HSL	hsl(231, 57%, 19%)
HSV	hsv(231, 72%, 30%)
CMYK	cmyk(72.4%, 61.8%, 0%, 70.2%)
CIE-LAB	lab(12.98, 14.31, -30.26)
CIE-LCH	lch(12.98, 33.47, 295.31°)
OKLab	oklab(25.54% 0.0023 -0.087)
OKLCH	oklch(25.54% 0.087 271.5)
XYZ	xyz(2.0527, 1.5598, 7.0290)
Luminance	0.0156 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.62

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151D4C #4C4415

analogous

#15394C #151D4C #29154C

triadic

#151D4C #4C151D #1D4C15

tetradic

#151D4C #4C1539 #4C4415 #154C29

square

#151D4C #4C1539 #4C4415 #154C29

split-complementary

#151D4C #4C2915 #394C15

monochromatic

#070918 #080B1C #151D4C #222F7C #2F42AC

Accessibility & contrast

On white

16.01

#151D4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#151D4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151D4C

16.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151D4C	#FFFFFF	#000000	##FFFFFF
##151D4C	1.00	16.01	1.31	16.01
#FFFFFF	16.01	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244E

Deuteranopia (green-blind)

#001F4B

Tritanopia (blue-blind)

#002831

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #151d4c;
/* rgb */ color: rgb(21, 29, 76);
/* oklch */ color: oklch(25.5% 0.087 271.5);

Tailwind

colors: {
  custom: {
    50: '#5a587e',
    500: '#151d4c',
    950: '#000000',
  },
}

SCSS

$custom: #151d4c;
$custom-light: #5a587e;
$custom-dark: #000000;

JSON

{
  "hex": "#151d4c",
  "rgb": {
    "r": 21,
    "g": 29,
    "b": 76
  },
  "hsl": {
    "h": 231.273,
    "s": 56.701,
    "l": 19.02
  },
  "oklch": {
    "l": 0.25537,
    "c": 0.08705,
    "h": 271.5
  },
  "luminance": 0.0156
}

Semantic roles & 50–950 ramp

primary

#151D4C

secondary

#847939

accent

#CA48E0

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #151D4C

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

Preview Lab → · Contrast checker → · Palette generator →