#151B3F#151B3F

#151B3F is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.9% C 0.069 H 273.0°. Best body text is #FFFFFF at 16.66:1 contrast (WCAG AA passes).

Color values

HEX	#151B3F
RGB	rgb(21, 27, 63)
HSL	hsl(231, 50%, 16%)
HSV	hsv(231, 67%, 25%)
CMYK	cmyk(66.7%, 57.1%, 0%, 75.3%)
CIE-LAB	lab(11.29, 10.46, -23.94)
CIE-LCH	lch(11.29, 26.12, 293.61°)
OKLab	oklab(23.92% 0.0036 -0.0684)
OKLCH	oklch(23.92% 0.069 273)
XYZ	xyz(1.5981, 1.3021, 4.8688)
Luminance	0.0130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B3F #3F3915

analogous

#15303F #151B3F #24153F

triadic

#151B3F #3F151B #1B3F15

tetradic

#151B3F #3F1530 #3F3915 #153F24

square

#151B3F #3F1530 #3F3915 #153F24

split-complementary

#151B3F #3F2415 #303F15

monochromatic

#080A17 #080A17 #151B3F #242F6D #34429B

Accessibility & contrast

On white

16.66

#151B3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#151B3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B3F

16.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B3F	#FFFFFF	#000000	##FFFFFF
##151B3F	1.00	16.66	1.26	16.66
#FFFFFF	16.66	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#082040

Deuteranopia (green-blind)

#031C3E

Tritanopia (blue-blind)

#00232A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #151b3f;
/* rgb */ color: rgb(21, 27, 63);
/* oklch */ color: oklch(23.9% 0.069 273.0);

Tailwind

colors: {
  custom: {
    50: '#575774',
    500: '#151b3f',
    950: '#000000',
  },
}

SCSS

$custom: #151b3f;
$custom-light: #575774;
$custom-dark: #000000;

JSON

{
  "hex": "#151b3f",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 63
  },
  "hsl": {
    "h": 231.429,
    "s": 50,
    "l": 16.471
  },
  "oklch": {
    "l": 0.23923,
    "c": 0.06855,
    "h": 273
  },
  "luminance": 0.01302
}

Semantic roles & 50–950 ramp

primary

#151B3F

secondary

#776E39

accent

#C64EDA

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #151B3F

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

Preview Lab → · Contrast checker → · Palette generator →