#151B5B#151B5B

#151B5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.113 H 271.9°. Best body text is #FFFFFF at 15.67:1 contrast (WCAG AA passes).

Color values

HEX	#151B5B
RGB	rgb(21, 27, 91)
HSL	hsl(235, 63%, 22%)
HSV	hsv(235, 77%, 36%)
CMYK	cmyk(76.9%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(13.82, 21.92, -39.09)
CIE-LCH	lch(13.82, 44.81, 299.28°)
OKLab	oklab(26.59% 0.0037 -0.1129)
OKLCH	oklch(26.59% 0.113 271.9)
XYZ	xyz(2.5889, 1.6984, 10.0869)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B5B #5B5515

analogous

#153E5B #151B5B #32155B

triadic

#151B5B #5B151B #1B5B15

tetradic

#151B5B #5B153E #5B5515 #155B32

square

#151B5B #5B153E #5B5515 #155B32

split-complementary

#151B5B #5B3215 #3E5B15

monochromatic

#060719 #0A0C29 #151B5B #202A8D #2C39BE

Accessibility & contrast

On white

15.67

#151B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#151B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B5B

15.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B5B	#FFFFFF	#000000	##FFFFFF
##151B5B	1.00	15.67	1.34	15.67
#FFFFFF	15.67	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #151b5b;
/* rgb */ color: rgb(21, 27, 91);
/* oklch */ color: oklch(26.6% 0.113 271.9);

Tailwind

colors: {
  custom: {
    50: '#5e578a',
    500: '#151b5b',
    950: '#000000',
  },
}

SCSS

$custom: #151b5b;
$custom-light: #5e578a;
$custom-dark: #000000;

JSON

{
  "hex": "#151b5b",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 234.857,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26591,
    "c": 0.11301,
    "h": 271.9
  },
  "luminance": 0.01699
}

Semantic roles & 50–950 ramp

primary

#151B5B

secondary

#928B39

accent

#D842E6

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #151B5B

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

Preview Lab → · Contrast checker → · Palette generator →