#151D4D#151D4D

#151D4D is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.6% C 0.089 H 271.5°. Best body text is #FFFFFF at 15.97:1 contrast (WCAG AA passes).

Color values

HEX	#151D4D
RGB	rgb(21, 29, 77)
HSL	hsl(231, 57%, 19%)
HSV	hsv(231, 73%, 30%)
CMYK	cmyk(72.7%, 62.3%, 0%, 69.8%)
CIE-LAB	lab(13.07, 14.73, -30.81)
CIE-LCH	lch(13.07, 34.15, 295.55°)
OKLab	oklab(25.63% 0.0024 -0.0886)
OKLCH	oklch(25.63% 0.089 271.5)
XYZ	xyz(2.0877, 1.5738, 7.2135)
Luminance	0.0157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.66

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151D4D #4D4515

analogous

#15394D #151D4D #29154D

triadic

#151D4D #4D151D #1D4D15

tetradic

#151D4D #4D1539 #4D4515 #154D29

square

#151D4D #4D1539 #4D4515 #154D29

split-complementary

#151D4D #4D2915 #394D15

monochromatic

#070918 #080B1D #151D4D #222F7D #2F41AD

Accessibility & contrast

On white

15.97

#151D4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#151D4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151D4D

15.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151D4D	#FFFFFF	#000000	##FFFFFF
##151D4D	1.00	15.97	1.31	15.97
#FFFFFF	15.97	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	15.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244F

Deuteranopia (green-blind)

#001F4C

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #151d4d;
/* rgb */ color: rgb(21, 29, 77);
/* oklch */ color: oklch(25.6% 0.089 271.5);

Tailwind

colors: {
  custom: {
    50: '#5a587f',
    500: '#151d4d',
    950: '#000000',
  },
}

SCSS

$custom: #151d4d;
$custom-light: #5a587f;
$custom-dark: #000000;

JSON

{
  "hex": "#151d4d",
  "rgb": {
    "r": 21,
    "g": 29,
    "b": 77
  },
  "hsl": {
    "h": 231.429,
    "s": 57.143,
    "l": 19.216
  },
  "oklch": {
    "l": 0.25629,
    "c": 0.08866,
    "h": 271.5
  },
  "luminance": 0.01574
}

Semantic roles & 50–950 ramp

primary

#151D4D

secondary

#857A39

accent

#CB47E0

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #151D4D

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

Preview Lab → · Contrast checker → · Palette generator →