#100C4F#100C4F

#100C4F is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 22.2% C 0.115 H 274.3°. Best body text is #FFFFFF at 17.68:1 contrast (WCAG AA passes).

Color values

HEX	#100C4F
RGB	rgb(16, 12, 79)
HSL	hsl(244, 74%, 18%)
HSV	hsv(244, 85%, 31%)
CMYK	cmyk(79.7%, 84.8%, 0%, 69%)
CIE-LAB	lab(8.46, 26.75, -39.76)
CIE-LCH	lch(8.46, 47.92, 303.94°)
OKLab	oklab(22.25% 0.0086 -0.115)
OKLCH	oklch(22.25% 0.115 274.3)
XYZ	xyz(1.7560, 0.9374, 7.4840)
Luminance	0.0094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.72

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100C4F #4B4F0C

analogous

#0C294F #100C4F #310C4F

triadic

#100C4F #4F100C #0C4F10

tetradic

#100C4F #4F0C29 #4B4F0C #0C4F31

square

#100C4F #4F0C29 #4B4F0C #0C4F31

split-complementary

#100C4F #4F310C #294F0C

monochromatic

#05041B #05041B #100C4F #1B1484 #261CB9

Accessibility & contrast

On white

17.68

#100C4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#100C4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100C4F

17.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100C4F	#FFFFFF	#000000	##FFFFFF
##100C4F	1.00	17.68	1.19	17.68
#FFFFFF	17.68	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.68	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: #100c4f;
/* rgb */ color: rgb(16, 12, 79);
/* oklch */ color: oklch(22.2% 0.115 274.3);

Tailwind

colors: {
  custom: {
    50: '#5b4c81',
    500: '#100c4f',
    950: '#000000',
  },
}

SCSS

$custom: #100c4f;
$custom-light: #5b4c81;
$custom-dark: #000000;

JSON

{
  "hex": "#100c4f",
  "rgb": {
    "r": 16,
    "g": 12,
    "b": 79
  },
  "hsl": {
    "h": 243.582,
    "s": 73.626,
    "l": 17.843
  },
  "oklch": {
    "l": 0.22249,
    "c": 0.11531,
    "h": 274.3
  },
  "luminance": 0.00938
}

Semantic roles & 50–950 ramp

primary

#100C4F

secondary

#858B2C

accent

#F038E5

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#04010A

muted

#79777C

Preview Lab

Preview with #100C4F

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

Preview Lab → · Contrast checker → · Palette generator →