#151D3B#151D3B

#151D3B is a very dark, muted blue. Relative luminance 0.014; OKLCH L 24.1% C 0.058 H 270.3°. Best body text is #FFFFFF at 16.53:1 contrast (WCAG AA passes).

Color values

HEX	#151D3B
RGB	rgb(21, 29, 59)
HSL	hsl(227, 48%, 16%)
HSV	hsv(227, 64%, 23%)
CMYK	cmyk(64.4%, 50.8%, 0%, 76.9%)
CIE-LAB	lab(11.65, 7.29, -20.53)
CIE-LCH	lch(11.65, 21.79, 289.56°)
OKLab	oklab(24.1% 0.0003 -0.0584)
OKLCH	oklch(24.1% 0.058 270.3)
XYZ	xyz(1.5378, 1.3538, 4.3171)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151D3B #3B3315

analogous

#15303B #151D3B #20153B

triadic

#151D3B #3B151D #1D3B15

tetradic

#151D3B #3B1530 #3B3315 #153B20

square

#151D3B #3B1530 #3B3315 #153B20

split-complementary

#151D3B #3B2015 #303B15

monochromatic

#080B17 #080B17 #151D3B #253368 #354995

Accessibility & contrast

On white

16.53

#151D3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#151D3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151D3B

16.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151D3B	#FFFFFF	#000000	##FFFFFF
##151D3B	1.00	16.53	1.27	16.53
#FFFFFF	16.53	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#10213C

Deuteranopia (green-blind)

#0B1D3A

Tritanopia (blue-blind)

#022429

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #151d3b;
/* rgb */ color: rgb(21, 29, 59);
/* oklch */ color: oklch(24.1% 0.058 270.3);

Tailwind

colors: {
  custom: {
    50: '#565871',
    500: '#151d3b',
    950: '#000000',
  },
}

SCSS

$custom: #151d3b;
$custom-light: #565871;
$custom-dark: #000000;

JSON

{
  "hex": "#151d3b",
  "rgb": {
    "r": 21,
    "g": 29,
    "b": 59
  },
  "hsl": {
    "h": 227.368,
    "s": 47.5,
    "l": 15.686
  },
  "oklch": {
    "l": 0.24099,
    "c": 0.05842,
    "h": 270.3
  },
  "luminance": 0.01354
}

Semantic roles & 50–950 ramp

primary

#151D3B

secondary

#726639

accent

#BB51D7

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #151D3B

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

Preview Lab → · Contrast checker → · Palette generator →