#100B4A#100B4A

#100B4A is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 21.5% C 0.109 H 275.5°. Best body text is #FFFFFF at 17.97:1 contrast (WCAG AA passes).

Color values

HEX	#100B4A
RGB	rgb(16, 11, 74)
HSL	hsl(245, 74%, 17%)
HSV	hsv(245, 85%, 29%)
CMYK	cmyk(78.4%, 85.1%, 0%, 71%)
CIE-LAB	lab(7.62, 25.49, -37.67)
CIE-LCH	lch(7.62, 45.48, 304.09°)
OKLab	oklab(21.47% 0.0104 -0.1089)
OKLCH	oklch(21.47% 0.109 275.5)
XYZ	xyz(1.5690, 0.8438, 6.5574)
Luminance	0.0084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B4A #454A0B

analogous

#0B264A #100B4A #300B4A

triadic

#100B4A #4A100B #0B4A10

tetradic

#100B4A #4A0B26 #454A0B #0B4A30

square

#100B4A #4A0B26 #454A0B #0B4A30

split-complementary

#100B4A #4A300B #264A0B

monochromatic

#06041B #06041B #100B4A #1C137F #271BB5

Accessibility & contrast

On white

17.97

#100B4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#100B4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B4A

17.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B4A	#FFFFFF	#000000	##FFFFFF
##100B4A	1.00	17.97	1.17	17.97
#FFFFFF	17.97	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00194C

Deuteranopia (green-blind)

#001449

Tritanopia (blue-blind)

#001E2A

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100b4a;
/* rgb */ color: rgb(16, 11, 74);
/* oklch */ color: oklch(21.5% 0.109 275.5);

Tailwind

colors: {
  custom: {
    50: '#594b7d',
    500: '#100b4a',
    950: '#000000',
  },
}

SCSS

$custom: #100b4a;
$custom-light: #594b7d;
$custom-dark: #000000;

JSON

{
  "hex": "#100b4a",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 74
  },
  "hsl": {
    "h": 244.762,
    "s": 74.118,
    "l": 16.667
  },
  "oklch": {
    "l": 0.21471,
    "c": 0.10944,
    "h": 275.5
  },
  "luminance": 0.00844
}

Semantic roles & 50–950 ramp

primary

#100B4A

secondary

#7F862B

accent

#F137E2

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100B4A

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

Preview Lab → · Contrast checker → · Palette generator →