#101857#101857

#101857 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.3% C 0.113 H 270.1°. Best body text is #FFFFFF at 16.27:1 contrast (WCAG AA passes).

Color values

HEX	#101857
RGB	rgb(16, 24, 87)
HSL	hsl(233, 69%, 20%)
HSV	hsv(233, 82%, 34%)
CMYK	cmyk(81.6%, 72.4%, 0%, 65.9%)
CIE-LAB	lab(12.29, 21.82, -38.90)
CIE-LCH	lch(12.29, 44.60, 299.29°)
OKLab	oklab(25.27% 0.0003 -0.1125)
OKLCH	oklch(25.27% 0.113 270.1)
XYZ	xyz(2.2600, 1.4513, 9.1760)
Luminance	0.0145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101857 #574F10

analogous

#103C57 #101857 #2B1057

triadic

#101857 #571018 #185710

tetradic

#101857 #57103C #574F10 #10572B

square

#101857 #57103C #574F10 #10572B

split-complementary

#101857 #572B10 #3C5710

monochromatic

#05071A #060A23 #101857 #1A268B #2335BE

Accessibility & contrast

On white

16.27

#101857 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#101857 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101857

16.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101857	#FFFFFF	#000000	##FFFFFF
##101857	1.00	16.27	1.29	16.27
#FFFFFF	16.27	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002459

Deuteranopia (green-blind)

#001D56

Tritanopia (blue-blind)

#002935

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #101857;
/* rgb */ color: rgb(16, 24, 87);
/* oklch */ color: oklch(25.3% 0.113 270.1);

Tailwind

colors: {
  custom: {
    50: '#5c5587',
    500: '#101857',
    950: '#000000',
  },
}

SCSS

$custom: #101857;
$custom-light: #5c5587;
$custom-dark: #000000;

JSON

{
  "hex": "#101857",
  "rgb": {
    "r": 16,
    "g": 24,
    "b": 87
  },
  "hsl": {
    "h": 233.239,
    "s": 68.932,
    "l": 20.196
  },
  "oklch": {
    "l": 0.25272,
    "c": 0.11255,
    "h": 270.1
  },
  "luminance": 0.01452
}

Semantic roles & 50–950 ramp

primary

#101857

secondary

#908632

accent

#D83CEC

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #101857

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

Preview Lab → · Contrast checker → · Palette generator →