#100B4E#100B4E

#100B4E is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.0% C 0.115 H 274.7°. Best body text is #FFFFFF at 17.80:1 contrast (WCAG AA passes).

Color values

HEX	#100B4E
RGB	rgb(16, 11, 78)
HSL	hsl(244, 75%, 17%)
HSV	hsv(244, 86%, 31%)
CMYK	cmyk(79.5%, 85.9%, 0%, 69.4%)
CIE-LAB	lab(8.12, 26.98, -39.62)
CIE-LCH	lch(8.12, 47.93, 304.26°)
OKLab	oklab(21.98% 0.0094 -0.1146)
OKLCH	oklch(21.98% 0.115 274.7)
XYZ	xyz(1.7080, 0.8994, 7.2898)
Luminance	0.0090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.66

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B4E #494E0B

analogous

#0B274E #100B4E #320B4E

triadic

#100B4E #4E100B #0B4E10

tetradic

#100B4E #4E0B27 #494E0B #0B4E32

square

#100B4E #4E0B27 #494E0B #0B4E32

split-complementary

#100B4E #4E320B #274E0B

monochromatic

#06041B #06041B #100B4E #1B1384 #261AB9

Accessibility & contrast

On white

17.80

#100B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B4E

17.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B4E	#FFFFFF	#000000	##FFFFFF
##100B4E	1.00	17.80	1.18	17.80
#FFFFFF	17.80	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001B50

Deuteranopia (green-blind)

#00154D

Tritanopia (blue-blind)

#001F2C

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #100b4e;
/* rgb */ color: rgb(16, 11, 78);
/* oklch */ color: oklch(22.0% 0.115 274.7);

Tailwind

colors: {
  custom: {
    50: '#5b4b80',
    500: '#100b4e',
    950: '#000000',
  },
}

SCSS

$custom: #100b4e;
$custom-light: #5b4b80;
$custom-dark: #000000;

JSON

{
  "hex": "#100b4e",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 78
  },
  "hsl": {
    "h": 244.478,
    "s": 75.281,
    "l": 17.451
  },
  "oklch": {
    "l": 0.21977,
    "c": 0.11496,
    "h": 274.7
  },
  "luminance": 0.009
}

Semantic roles & 50–950 ramp

primary

#100B4E

secondary

#838A2B

accent

#F236E4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100B4E

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

Preview Lab → · Contrast checker → · Palette generator →