#151C3B#151C3B

#151C3B is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.8% C 0.060 H 271.6°. Best body text is #FFFFFF at 16.65:1 contrast (WCAG AA passes).

Color values

HEX	#151C3B
RGB	rgb(21, 28, 59)
HSL	hsl(229, 48%, 16%)
HSV	hsv(229, 64%, 23%)
CMYK	cmyk(64.4%, 52.5%, 0%, 76.9%)
CIE-LAB	lab(11.31, 8.06, -21.06)
CIE-LCH	lch(11.31, 22.55, 290.94°)
OKLab	oklab(23.85% 0.0017 -0.06)
OKLCH	oklch(23.85% 0.06 271.6)
XYZ	xyz(1.5137, 1.3056, 4.3091)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151C3B #3B3415

analogous

#152F3B #151C3B #21153B

triadic

#151C3B #3B151C #1C3B15

tetradic

#151C3B #3B152F #3B3415 #153B21

square

#151C3B #3B152F #3B3415 #153B21

split-complementary

#151C3B #3B2115 #2F3B15

monochromatic

#080B17 #080B17 #151C3B #253168 #354795

Accessibility & contrast

On white

16.65

#151C3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#151C3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151C3B

16.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151C3B	#FFFFFF	#000000	##FFFFFF
##151C3B	1.00	16.65	1.26	16.65
#FFFFFF	16.65	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E203C

Deuteranopia (green-blind)

#091D3A

Tritanopia (blue-blind)

#022328

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #151c3b;
/* rgb */ color: rgb(21, 28, 59);
/* oklch */ color: oklch(23.8% 0.060 271.6);

Tailwind

colors: {
  custom: {
    50: '#565771',
    500: '#151c3b',
    950: '#000000',
  },
}

SCSS

$custom: #151c3b;
$custom-light: #565771;
$custom-dark: #000000;

JSON

{
  "hex": "#151c3b",
  "rgb": {
    "r": 21,
    "g": 28,
    "b": 59
  },
  "hsl": {
    "h": 228.947,
    "s": 47.5,
    "l": 15.686
  },
  "oklch": {
    "l": 0.23845,
    "c": 0.06001,
    "h": 271.6
  },
  "luminance": 0.01306
}

Semantic roles & 50–950 ramp

primary

#151C3B

secondary

#726839

accent

#BE51D7

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #151C3B

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

Preview Lab → · Contrast checker → · Palette generator →