#100D21#100D21

#100D21 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.5% C 0.040 H 288.4°. Best body text is #FFFFFF at 19.06:1 contrast (WCAG AA passes).

Color values

HEX	#100D21
RGB	rgb(16, 13, 33)
HSL	hsl(249, 43%, 9%)
HSV	hsv(249, 61%, 13%)
CMYK	cmyk(51.5%, 60.6%, 0%, 87.1%)
CIE-LAB	lab(4.59, 6.12, -12.49)
CIE-LCH	lch(4.59, 13.90, 296.11°)
OKLab	oklab(17.51% 0.0128 -0.0384)
OKLCH	oklch(17.51% 0.04 288.4)
XYZ	xyz(0.6320, 0.5078, 1.5033)
Luminance	0.0051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D21 #1E210D

analogous

#0D1421 #100D21 #1A0D21

triadic

#100D21 #21100D #0D2110

tetradic

#100D21 #210D14 #1E210D #0D211A

square

#100D21 #210D14 #1E210D #0D211A

split-complementary

#100D21 #211A0D #14210D

monochromatic

#0B0916 #0B0916 #100D21 #251E4D #3B3079

Accessibility & contrast

On white

19.06

#100D21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#100D21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D21

19.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D21	#FFFFFF	#000000	##FFFFFF
##100D21	1.00	19.06	1.10	19.06
#FFFFFF	19.06	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#061022

Deuteranopia (green-blind)

#060F21

Tritanopia (blue-blind)

#0B1115

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #100d21;
/* rgb */ color: rgb(16, 13, 33);
/* oklch */ color: oklch(17.5% 0.040 288.4);

Tailwind

colors: {
  custom: {
    50: '#4e4c5c',
    500: '#100d21',
    950: '#000000',
  },
}

SCSS

$custom: #100d21;
$custom-light: #4e4c5c;
$custom-dark: #000000;

JSON

{
  "hex": "#100d21",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 33
  },
  "hsl": {
    "h": 249,
    "s": 43.478,
    "l": 9.02
  },
  "oklch": {
    "l": 0.1751,
    "c": 0.04046,
    "h": 288.4
  },
  "luminance": 0.00508
}

Semantic roles & 50–950 ramp

primary

#100D21

secondary

#545A30

accent

#D355C0

background

#F4F4F5

surface

#E7E7E9

border

#C3C3C5

text

#010104

muted

#777779

Preview Lab

Preview with #100D21

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

Preview Lab → · Contrast checker → · Palette generator →