#151B5E#151B5E

#151B5E is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.117 H 271.7°. Best body text is #FFFFFF at 15.55:1 contrast (WCAG AA passes).

Color values

HEX	#151B5E
RGB	rgb(21, 27, 94)
HSL	hsl(235, 63%, 23%)
HSV	hsv(235, 78%, 37%)
CMYK	cmyk(77.7%, 71.3%, 0%, 63.1%)
CIE-LAB	lab(14.12, 23.11, -40.59)
CIE-LCH	lch(14.12, 46.71, 299.66°)
OKLab	oklab(26.91% 0.0035 -0.1174)
OKLCH	oklch(26.91% 0.117 271.7)
XYZ	xyz(2.7209, 1.7512, 10.7821)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B5E #5E5815

analogous

#15405E #151B5E #33155E

triadic

#151B5E #5E151B #1B5E15

tetradic

#151B5E #5E1540 #5E5815 #155E33

square

#151B5E #5E1540 #5E5815 #155E33

split-complementary

#151B5E #5E3315 #405E15

monochromatic

#060719 #0A0D2C #151B5E #202990 #2B38C2

Accessibility & contrast

On white

15.55

#151B5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#151B5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B5E

15.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B5E	#FFFFFF	#000000	##FFFFFF
##151B5E	1.00	15.55	1.35	15.55
#FFFFFF	15.55	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002760

Deuteranopia (green-blind)

#00205D

Tritanopia (blue-blind)

#002D3A

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #151b5e;
/* rgb */ color: rgb(21, 27, 94);
/* oklch */ color: oklch(26.9% 0.117 271.7);

Tailwind

colors: {
  custom: {
    50: '#5f578c',
    500: '#151b5e',
    950: '#000000',
  },
}

SCSS

$custom: #151b5e;
$custom-light: #5f578c;
$custom-dark: #000000;

JSON

{
  "hex": "#151b5e",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 94
  },
  "hsl": {
    "h": 235.068,
    "s": 63.478,
    "l": 22.549
  },
  "oklch": {
    "l": 0.26907,
    "c": 0.11741,
    "h": 271.7
  },
  "luminance": 0.01751
}

Semantic roles & 50–950 ramp

primary

#151B5E

secondary

#958E39

accent

#D941E7

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #151B5E

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

Preview Lab → · Contrast checker → · Palette generator →