#151D5B#151D5B

#151D5B is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.110 H 271.1°. Best body text is #FFFFFF at 15.46:1 contrast (WCAG AA passes).

Color values

HEX	#151D5B
RGB	rgb(21, 29, 91)
HSL	hsl(233, 63%, 22%)
HSV	hsv(233, 77%, 36%)
CMYK	cmyk(76.9%, 68.1%, 0%, 64.3%)
CIE-LAB	lab(14.36, 20.48, -38.19)
CIE-LCH	lch(14.36, 43.34, 298.20°)
OKLab	oklab(26.99% 0.0022 -0.1103)
OKLCH	oklch(26.99% 0.11 271.1)
XYZ	xyz(2.6363, 1.7932, 10.1027)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151D5B #5B5315

analogous

#15405B #151D5B #30155B

triadic

#151D5B #5B151D #1D5B15

tetradic

#151D5B #5B1540 #5B5315 #155B30

square

#151D5B #5B1540 #5B5315 #155B30

split-complementary

#151D5B #5B3015 #405B15

monochromatic

#060819 #0A0D29 #151D5B #202D8D #2C3DBE

Accessibility & contrast

On white

15.46

#151D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#151D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151D5B

15.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151D5B	#FFFFFF	#000000	##FFFFFF
##151D5B	1.00	15.46	1.36	15.46
#FFFFFF	15.46	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285D

Deuteranopia (green-blind)

#00215A

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #151d5b;
/* rgb */ color: rgb(21, 29, 91);
/* oklch */ color: oklch(27.0% 0.110 271.1);

Tailwind

colors: {
  custom: {
    50: '#5e588a',
    500: '#151d5b',
    950: '#000000',
  },
}

SCSS

$custom: #151d5b;
$custom-light: #5e588a;
$custom-dark: #000000;

JSON

{
  "hex": "#151d5b",
  "rgb": {
    "r": 21,
    "g": 29,
    "b": 91
  },
  "hsl": {
    "h": 233.143,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.2699,
    "c": 0.11034,
    "h": 271.1
  },
  "luminance": 0.01793
}

Semantic roles & 50–950 ramp

primary

#151D5B

secondary

#928839

accent

#D342E6

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #151D5B

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

Preview Lab → · Contrast checker → · Palette generator →