#100C4B#100C4B

#100C4B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.7% C 0.110 H 275.0°. Best body text is #FFFFFF at 17.85:1 contrast (WCAG AA passes).

Color values

HEX	#100C4B
RGB	rgb(16, 12, 75)
HSL	hsl(244, 72%, 17%)
HSV	hsv(244, 84%, 29%)
CMYK	cmyk(78.7%, 84%, 0%, 70.6%)
CIE-LAB	lab(7.96, 25.27, -37.81)
CIE-LCH	lch(7.96, 45.48, 303.76°)
OKLab	oklab(21.75% 0.0096 -0.1093)
OKLCH	oklch(21.75% 0.11 275)
XYZ	xyz(1.6147, 0.8809, 6.7402)
Luminance	0.0088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C4B #474B0C

analogous

#0C274B #100C4B #300C4B

triadic

#100C4B #4B100C #0C4B10

tetradic

#100C4B #4B0C27 #474B0C #0C4B30

square

#100C4B #4B0C27 #474B0C #0C4B30

split-complementary

#100C4B #4B300C #274B0C

monochromatic

#06041A #06041A #100C4B #1B1480 #271DB5

Accessibility & contrast

On white

17.85

#100C4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100C4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C4B

17.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C4B	#FFFFFF	#000000	##FFFFFF
##100C4B	1.00	17.85	1.18	17.85
#FFFFFF	17.85	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A4D

Deuteranopia (green-blind)

#00154A

Tritanopia (blue-blind)

#001F2B

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100c4b;
/* rgb */ color: rgb(16, 12, 75);
/* oklch */ color: oklch(21.7% 0.110 275.0);

Tailwind

colors: {
  custom: {
    50: '#5a4c7e',
    500: '#100c4b',
    950: '#000000',
  },
}

SCSS

$custom: #100c4b;
$custom-light: #5a4c7e;
$custom-dark: #000000;

JSON

{
  "hex": "#100c4b",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 75
  },
  "hsl": {
    "h": 243.81,
    "s": 72.414,
    "l": 17.059
  },
  "oklch": {
    "l": 0.21749,
    "c": 0.10976,
    "h": 275
  },
  "luminance": 0.00881
}

Semantic roles & 50–950 ramp

primary

#100C4B

secondary

#81872C

accent

#EF39E4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100C4B

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

Preview Lab → · Contrast checker → · Palette generator →