#151B3A#151B3A

#151B3A is a very dark, muted blue. Relative luminance 0.012; OKLCH L 23.5% C 0.060 H 272.7°. Best body text is #FFFFFF at 16.80:1 contrast (WCAG AA passes).

Color values

HEX	#151B3A
RGB	rgb(21, 27, 58)
HSL	hsl(230, 47%, 15%)
HSV	hsv(230, 64%, 23%)
CMYK	cmyk(63.8%, 53.4%, 0%, 77.3%)
CIE-LAB	lab(10.91, 8.43, -20.99)
CIE-LCH	lch(10.91, 22.62, 291.87°)
OKLab	oklab(23.51% 0.0029 -0.0598)
OKLCH	oklch(23.51% 0.06 272.7)
XYZ	xyz(1.4647, 1.2487, 4.1660)
Luminance	0.0125 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B3A #3A3415

analogous

#152D3A #151B3A #21153A

triadic

#151B3A #3A151B #1B3A15

tetradic

#151B3A #3A152D #3A3415 #153A21

square

#151B3A #3A152D #3A3415 #153A21

split-complementary

#151B3A #3A2115 #2D3A15

monochromatic

#080A16 #080A16 #151B3A #253067 #364594

Accessibility & contrast

On white

16.80

#151B3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#151B3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B3A

16.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B3A	#FFFFFF	#000000	##FFFFFF
##151B3A	1.00	16.80	1.25	16.80
#FFFFFF	16.80	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D1F3B

Deuteranopia (green-blind)

#081C39

Tritanopia (blue-blind)

#032227

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #151b3a;
/* rgb */ color: rgb(21, 27, 58);
/* oklch */ color: oklch(23.5% 0.060 272.7);

Tailwind

colors: {
  custom: {
    50: '#565770',
    500: '#151b3a',
    950: '#000000',
  },
}

SCSS

$custom: #151b3a;
$custom-light: #565770;
$custom-dark: #000000;

JSON

{
  "hex": "#151b3a",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 58
  },
  "hsl": {
    "h": 230.27,
    "s": 46.835,
    "l": 15.49
  },
  "oklch": {
    "l": 0.23514,
    "c": 0.05987,
    "h": 272.7
  },
  "luminance": 0.01249
}

Semantic roles & 50–950 ramp

primary

#151B3A

secondary

#716839

accent

#C151D6

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #151B3A

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

Preview Lab → · Contrast checker → · Palette generator →