#100B4F#100B4F

#100B4F is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.1% C 0.116 H 274.5°. Best body text is #FFFFFF at 17.75:1 contrast (WCAG AA passes).

Color values

HEX	#100B4F
RGB	rgb(16, 11, 79)
HSL	hsl(244, 76%, 18%)
HSV	hsv(244, 86%, 31%)
CMYK	cmyk(79.7%, 86.1%, 0%, 69%)
CIE-LAB	lab(8.25, 27.35, -40.10)
CIE-LCH	lch(8.25, 48.54, 304.30°)
OKLab	oklab(22.1% 0.0091 -0.116)
OKLCH	oklch(22.1% 0.116 274.5)
XYZ	xyz(1.7442, 0.9138, 7.4801)
Luminance	0.0091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.83

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B4F #4A4F0B

analogous

#0B284F #100B4F #320B4F

triadic

#100B4F #4F100B #0B4F10

tetradic

#100B4F #4F0B28 #4A4F0B #0B4F32

square

#100B4F #4F0B28 #4A4F0B #0B4F32

split-complementary

#100B4F #4F320B #284F0B

monochromatic

#05041B #05041B #100B4F #1B1285 #261ABA

Accessibility & contrast

On white

17.75

#100B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B4F

17.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B4F	#FFFFFF	#000000	##FFFFFF
##100B4F	1.00	17.75	1.18	17.75
#FFFFFF	17.75	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B51

Deuteranopia (green-blind)

#00154E

Tritanopia (blue-blind)

#00202D

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100b4f;
/* rgb */ color: rgb(16, 11, 79);
/* oklch */ color: oklch(22.1% 0.116 274.5);

Tailwind

colors: {
  custom: {
    50: '#5b4b81',
    500: '#100b4f',
    950: '#000000',
  },
}

SCSS

$custom: #100b4f;
$custom-light: #5b4b81;
$custom-dark: #000000;

JSON

{
  "hex": "#100b4f",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 79
  },
  "hsl": {
    "h": 244.412,
    "s": 75.556,
    "l": 17.647
  },
  "oklch": {
    "l": 0.22104,
    "c": 0.11632,
    "h": 274.5
  },
  "luminance": 0.00914
}

Semantic roles & 50–950 ramp

primary

#100B4F

secondary

#848B2B

accent

#F236E4

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#04010A

muted

#79777C

Preview Lab

Preview with #100B4F

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

Preview Lab → · Contrast checker → · Palette generator →