#100D5F#100D5F

#100D5F is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.4% C 0.136 H 271.7°. Best body text is #FFFFFF at 16.87:1 contrast (WCAG AA passes).

Color values

HEX	#100D5F
RGB	rgb(16, 13, 95)
HSL	hsl(242, 76%, 21%)
HSV	hsv(242, 86%, 37%)
CMYK	cmyk(83.2%, 86.3%, 0%, 62.7%)
CIE-LAB	lab(10.73, 31.92, -46.87)
CIE-LCH	lch(10.73, 56.70, 304.25°)
OKLab	oklab(24.44% 0.004 -0.1356)
OKLCH	oklch(24.44% 0.136 271.7)
XYZ	xyz(2.4225, 1.2240, 10.9328)
Luminance	0.0122 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D5F #5C5F0D

analogous

#0D335F #100D5F #390D5F

triadic

#100D5F #5F100D #0D5F10

tetradic

#100D5F #5F0D33 #5C5F0D #0D5F39

square

#100D5F #5F0D33 #5C5F0D #0D5F39

split-complementary

#100D5F #5F390D #335F0D

monochromatic

#05041B #070629 #100D5F #191495 #221CCB

Accessibility & contrast

On white

16.87

#100D5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#100D5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D5F

16.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D5F	#FFFFFF	#000000	##FFFFFF
##100D5F	1.00	16.87	1.24	16.87
#FFFFFF	16.87	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002161

Deuteranopia (green-blind)

#00195E

Tritanopia (blue-blind)

#002737

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #100d5f;
/* rgb */ color: rgb(16, 13, 95);
/* oklch */ color: oklch(24.4% 0.136 271.7);

Tailwind

colors: {
  custom: {
    50: '#5f4e8d',
    500: '#100d5f',
    950: '#000000',
  },
}

SCSS

$custom: #100d5f;
$custom-light: #5f4e8d;
$custom-dark: #000000;

JSON

{
  "hex": "#100d5f",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 95
  },
  "hsl": {
    "h": 242.195,
    "s": 75.926,
    "l": 21.176
  },
  "oklch": {
    "l": 0.24442,
    "c": 0.1357,
    "h": 271.7
  },
  "luminance": 0.01224
}

Semantic roles & 50–950 ramp

primary

#100D5F

secondary

#95992F

accent

#F335EC

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020C

muted

#7A787D

Preview Lab

Preview with #100D5F

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

Preview Lab → · Contrast checker → · Palette generator →