#100D57#100D57

#100D57 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.4% C 0.125 H 272.8°. Best body text is #FFFFFF at 17.25:1 contrast (WCAG AA passes).

Color values

HEX	#100D57
RGB	rgb(16, 13, 87)
HSL	hsl(242, 74%, 20%)
HSV	hsv(242, 85%, 34%)
CMYK	cmyk(81.6%, 85.1%, 0%, 65.9%)
CIE-LAB	lab(9.69, 29.07, -43.20)
CIE-LCH	lch(9.69, 52.07, 303.94°)
OKLab	oklab(23.41% 0.0061 -0.125)
OKLCH	oklch(23.41% 0.125 272.8)
XYZ	xyz(2.0773, 1.0859, 9.1151)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D57 #54570D

analogous

#0D2F57 #100D57 #350D57

triadic

#100D57 #57100D #0D5710

tetradic

#100D57 #570D2F #54570D #0D5735

square

#100D57 #570D2F #54570D #0D5735

split-complementary

#100D57 #57350D #2F570D

monochromatic

#05041B #060522 #100D57 #1A158C #241DC1

Accessibility & contrast

On white

17.25

#100D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#100D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D57

17.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D57	#FFFFFF	#000000	##FFFFFF
##100D57	1.00	17.25	1.22	17.25
#FFFFFF	17.25	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E59

Deuteranopia (green-blind)

#001756

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #100d57;
/* rgb */ color: rgb(16, 13, 87);
/* oklch */ color: oklch(23.4% 0.125 272.8);

Tailwind

colors: {
  custom: {
    50: '#5d4d87',
    500: '#100d57',
    950: '#000000',
  },
}

SCSS

$custom: #100d57;
$custom-light: #5d4d87;
$custom-dark: #000000;

JSON

{
  "hex": "#100d57",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 87
  },
  "hsl": {
    "h": 242.432,
    "s": 74,
    "l": 19.608
  },
  "oklch": {
    "l": 0.23409,
    "c": 0.12517,
    "h": 272.8
  },
  "luminance": 0.01086
}

Semantic roles & 50–950 ramp

primary

#100D57

secondary

#8E922E

accent

#F137E9

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05010B

muted

#79777C

Preview Lab

Preview with #100D57

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

Preview Lab → · Contrast checker → · Palette generator →