#100B4C#100B4C

#100B4C is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.7% C 0.112 H 275.1°. Best body text is #FFFFFF at 17.88:1 contrast (WCAG AA passes).

Color values

HEX	#100B4C
RGB	rgb(16, 11, 76)
HSL	hsl(245, 75%, 17%)
HSV	hsv(245, 86%, 30%)
CMYK	cmyk(78.9%, 85.5%, 0%, 70.2%)
CIE-LAB	lab(7.87, 26.25, -38.65)
CIE-LCH	lch(7.87, 46.73, 304.18°)
OKLab	oklab(21.72% 0.0099 -0.1118)
OKLCH	oklch(21.72% 0.112 275.1)
XYZ	xyz(1.6374, 0.8711, 6.9179)
Luminance	0.0087 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.32

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B4C #474C0B

analogous

#0B274C #100B4C #310B4C

triadic

#100B4C #4C100B #0B4C10

tetradic

#100B4C #4C0B27 #474C0B #0B4C31

square

#100B4C #4C0B27 #474C0B #0B4C31

split-complementary

#100B4C #4C310B #274C0B

monochromatic

#06041B #06041B #100B4C #1B1381 #271AB7

Accessibility & contrast

On white

17.88

#100B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#100B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B4C

17.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B4C	#FFFFFF	#000000	##FFFFFF
##100B4C	1.00	17.88	1.17	17.88
#FFFFFF	17.88	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A4E

Deuteranopia (green-blind)

#00144B

Tritanopia (blue-blind)

#001F2B

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100b4c;
/* rgb */ color: rgb(16, 11, 76);
/* oklch */ color: oklch(21.7% 0.112 275.1);

Tailwind

colors: {
  custom: {
    50: '#5a4b7f',
    500: '#100b4c',
    950: '#000000',
  },
}

SCSS

$custom: #100b4c;
$custom-light: #5a4b7f;
$custom-dark: #000000;

JSON

{
  "hex": "#100b4c",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 76
  },
  "hsl": {
    "h": 244.615,
    "s": 74.713,
    "l": 17.059
  },
  "oklch": {
    "l": 0.21723,
    "c": 0.11222,
    "h": 275.1
  },
  "luminance": 0.00871
}

Semantic roles & 50–950 ramp

primary

#100B4C

secondary

#81882B

accent

#F136E3

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100B4C

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

Preview Lab → · Contrast checker → · Palette generator →