#101851#101851

#101851 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.104 H 270.4°. Best body text is #FFFFFF at 16.51:1 contrast (WCAG AA passes).

Color values

HEX	#101851
RGB	rgb(16, 24, 81)
HSL	hsl(233, 67%, 19%)
HSV	hsv(233, 80%, 32%)
CMYK	cmyk(80.2%, 70.4%, 0%, 68.2%)
CIE-LAB	lab(11.67, 19.34, -35.84)
CIE-LCH	lch(11.67, 40.73, 298.35°)
OKLab	oklab(24.63% 0.0008 -0.1036)
OKLCH	oklch(24.63% 0.104 270.4)
XYZ	xyz(2.0250, 1.3573, 7.9382)
Luminance	0.0136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101851 #514910

analogous

#103951 #101851 #291051

triadic

#101851 #511018 #185110

tetradic

#101851 #511039 #514910 #105129

square

#101851 #511039 #514910 #105129

split-complementary

#101851 #512910 #395110

monochromatic

#05081A #06091E #101851 #1A2784 #2436B7

Accessibility & contrast

On white

16.51

#101851 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#101851 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101851

16.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101851	#FFFFFF	#000000	##FFFFFF
##101851	1.00	16.51	1.27	16.51
#FFFFFF	16.51	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002253

Deuteranopia (green-blind)

#001C50

Tritanopia (blue-blind)

#002732

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #101851;
/* rgb */ color: rgb(16, 24, 81);
/* oklch */ color: oklch(24.6% 0.104 270.4);

Tailwind

colors: {
  custom: {
    50: '#5a5482',
    500: '#101851',
    950: '#000000',
  },
}

SCSS

$custom: #101851;
$custom-light: #5a5482;
$custom-dark: #000000;

JSON

{
  "hex": "#101851",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 81
  },
  "hsl": {
    "h": 232.615,
    "s": 67.01,
    "l": 19.02
  },
  "oklch": {
    "l": 0.24625,
    "c": 0.10361,
    "h": 270.4
  },
  "luminance": 0.01358
}

Semantic roles & 50–950 ramp

primary

#101851

secondary

#8B8032

accent

#D53EEA

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#04020A

muted

#79787C

Preview Lab

Preview with #101851

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

Preview Lab → · Contrast checker → · Palette generator →