#100B4B#100B4B

#100B4B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.6% C 0.111 H 275.3°. Best body text is #FFFFFF at 17.92:1 contrast (WCAG AA passes).

Color values

HEX	#100B4B
RGB	rgb(16, 11, 75)
HSL	hsl(245, 74%, 17%)
HSV	hsv(245, 85%, 29%)
CMYK	cmyk(78.7%, 85.3%, 0%, 70.6%)
CIE-LAB	lab(7.74, 25.88, -38.16)
CIE-LCH	lch(7.74, 46.11, 304.14°)
OKLab	oklab(21.6% 0.0102 -0.1104)
OKLCH	oklch(21.6% 0.111 275.3)
XYZ	xyz(1.6029, 0.8573, 6.7363)
Luminance	0.0086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.15

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B4B #464B0B

analogous

#0B264B #100B4B #300B4B

triadic

#100B4B #4B100B #0B4B10

tetradic

#100B4B #4B0B26 #464B0B #0B4B30

square

#100B4B #4B0B26 #464B0B #0B4B30

split-complementary

#100B4B #4B300B #264B0B

monochromatic

#06041B #06041B #100B4B #1B1380 #271BB6

Accessibility & contrast

On white

17.92

#100B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#100B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B4B

17.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B4B	#FFFFFF	#000000	##FFFFFF
##100B4B	1.00	17.92	1.17	17.92
#FFFFFF	17.92	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A4D

Deuteranopia (green-blind)

#00144A

Tritanopia (blue-blind)

#001E2B

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100b4b;
/* rgb */ color: rgb(16, 11, 75);
/* oklch */ color: oklch(21.6% 0.111 275.3);

Tailwind

colors: {
  custom: {
    50: '#5a4b7e',
    500: '#100b4b',
    950: '#000000',
  },
}

SCSS

$custom: #100b4b;
$custom-light: #5a4b7e;
$custom-dark: #000000;

JSON

{
  "hex": "#100b4b",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 75
  },
  "hsl": {
    "h": 244.688,
    "s": 74.419,
    "l": 16.863
  },
  "oklch": {
    "l": 0.21597,
    "c": 0.11083,
    "h": 275.3
  },
  "luminance": 0.00858
}

Semantic roles & 50–950 ramp

primary

#100B4B

secondary

#80872B

accent

#F137E2

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100B4B

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

Preview Lab → · Contrast checker → · Palette generator →