#151B2F#151B2F

#151B2F is a very dark, muted blue. Relative luminance 0.011; OKLCH L 22.7% C 0.040 H 270.3°. Best body text is #FFFFFF at 17.08:1 contrast (WCAG AA passes).

Color values

HEX	#151B2F
RGB	rgb(21, 27, 47)
HSL	hsl(226, 38%, 13%)
HSV	hsv(226, 55%, 18%)
CMYK	cmyk(55.3%, 42.6%, 0%, 81.6%)
CIE-LAB	lab(10.17, 4.07, -14.23)
CIE-LCH	lch(10.17, 14.80, 285.96°)
OKLab	oklab(22.71% 0.0002 -0.04)
OKLCH	oklch(22.71% 0.04 270.3)
XYZ	xyz(1.2141, 1.1485, 2.8465)
Luminance	0.0115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B2F #2F2915

analogous

#15282F #151B2F #1C152F

triadic

#151B2F #2F151B #1B2F15

tetradic

#151B2F #2F1528 #2F2915 #152F1C

square

#151B2F #2F1528 #2F2915 #152F1C

split-complementary

#151B2F #2F1C15 #282F15

monochromatic

#090C15 #090C15 #151B2F #283359 #3B4C84

Accessibility & contrast

On white

17.08

#151B2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#151B2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B2F

17.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B2F	#FFFFFF	#000000	##FFFFFF
##151B2F	1.00	17.08	1.23	17.08
#FFFFFF	17.08	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#141D30

Deuteranopia (green-blind)

#111B2F

Tritanopia (blue-blind)

#0B1F22

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #151b2f;
/* rgb */ color: rgb(21, 27, 47);
/* oklch */ color: oklch(22.7% 0.040 270.3);

Tailwind

colors: {
  custom: {
    50: '#545767',
    500: '#151b2f',
    950: '#000000',
  },
}

SCSS

$custom: #151b2f;
$custom-light: #545767;
$custom-dark: #000000;

JSON

{
  "hex": "#151b2f",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 47
  },
  "hsl": {
    "h": 226.154,
    "s": 38.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.22706,
    "c": 0.04003,
    "h": 270.3
  },
  "luminance": 0.01149
}

Semantic roles & 50–950 ramp

primary

#151B2F

secondary

#655B3B

accent

#B35ACE

background

#F4F5F6

surface

#E7E9EB

border

#C3C5C6

text

#030306

muted

#78787A

Preview Lab

Preview with #151B2F

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

Preview Lab → · Contrast checker → · Palette generator →