#101858#101858

#101858 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.4% C 0.114 H 270.1°. Best body text is #FFFFFF at 16.23:1 contrast (WCAG AA passes).

Color values

HEX	#101858
RGB	rgb(16, 24, 88)
HSL	hsl(233, 69%, 20%)
HSV	hsv(233, 82%, 35%)
CMYK	cmyk(81.8%, 72.7%, 0%, 65.5%)
CIE-LAB	lab(12.40, 22.22, -39.40)
CIE-LCH	lch(12.40, 45.24, 299.43°)
OKLab	oklab(25.38% 0.0002 -0.114)
OKLCH	oklch(25.38% 0.114 270.1)
XYZ	xyz(2.3012, 1.4678, 9.3927)
Luminance	0.0147 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101858 #585010

analogous

#103C58 #101858 #2C1058

triadic

#101858 #581018 #185810

tetradic

#101858 #58103C #585010 #10582C

square

#101858 #58103C #585010 #10582C

split-complementary

#101858 #582C10 #3C5810

monochromatic

#05071A #070A24 #101858 #19268C #2334C0

Accessibility & contrast

On white

16.23

#101858 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#101858 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101858

16.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101858	#FFFFFF	#000000	##FFFFFF
##101858	1.00	16.23	1.29	16.23
#FFFFFF	16.23	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245A

Deuteranopia (green-blind)

#001D57

Tritanopia (blue-blind)

#002935

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #101858;
/* rgb */ color: rgb(16, 24, 88);
/* oklch */ color: oklch(25.4% 0.114 270.1);

Tailwind

colors: {
  custom: {
    50: '#5c5588',
    500: '#101858',
    950: '#000000',
  },
}

SCSS

$custom: #101858;
$custom-light: #5c5588;
$custom-dark: #000000;

JSON

{
  "hex": "#101858",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 88
  },
  "hsl": {
    "h": 233.333,
    "s": 69.231,
    "l": 20.392
  },
  "oklch": {
    "l": 0.25382,
    "c": 0.11402,
    "h": 270.1
  },
  "luminance": 0.01468
}

Semantic roles & 50–950 ramp

primary

#101858

secondary

#918732

accent

#D83CEC

background

#F5F4F8

surface

#E9E7F0

border

#C5C3CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #101858

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

Preview Lab → · Contrast checker → · Palette generator →