#101557#101557

#101557 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.7% C 0.116 H 271.1°. Best body text is #FFFFFF at 16.57:1 contrast (WCAG AA passes).

Color values

HEX	#101557
RGB	rgb(16, 21, 87)
HSL	hsl(236, 69%, 20%)
HSV	hsv(236, 82%, 34%)
CMYK	cmyk(81.6%, 75.9%, 0%, 65.9%)
CIE-LAB	lab(11.51, 23.93, -40.19)
CIE-LCH	lch(11.51, 46.77, 300.78°)
OKLab	oklab(24.71% 0.0021 -0.1163)
OKLCH	oklch(24.71% 0.116 271.1)
XYZ	xyz(2.2016, 1.3344, 9.1565)
Luminance	0.0134 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101557 #575210

analogous

#103857 #101557 #2F1057

triadic

#101557 #571015 #155710

tetradic

#101557 #571038 #575210 #10572F

square

#101557 #571038 #575210 #10572F

split-complementary

#101557 #572F10 #385710

monochromatic

#05061A #060923 #101557 #1A218B #232EBE

Accessibility & contrast

On white

16.57

#101557 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#101557 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101557

16.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101557	#FFFFFF	#000000	##FFFFFF
##101557	1.00	16.57	1.27	16.57
#FFFFFF	16.57	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002259

Deuteranopia (green-blind)

#001B56

Tritanopia (blue-blind)

#002734

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #101557;
/* rgb */ color: rgb(16, 21, 87);
/* oklch */ color: oklch(24.7% 0.116 271.1);

Tailwind

colors: {
  custom: {
    50: '#5c5287',
    500: '#101557',
    950: '#000000',
  },
}

SCSS

$custom: #101557;
$custom-light: #5c5287;
$custom-dark: #000000;

JSON

{
  "hex": "#101557",
  "rgb": {
    "r": 16,
    "g": 21,
    "b": 87
  },
  "hsl": {
    "h": 235.775,
    "s": 68.932,
    "l": 20.196
  },
  "oklch": {
    "l": 0.24706,
    "c": 0.11633,
    "h": 271.1
  },
  "luminance": 0.01335
}

Semantic roles & 50–950 ramp

primary

#101557

secondary

#908A32

accent

#DF3CEC

background

#F5F4F8

surface

#E9E7F0

border

#C5C3CB

text

#05020B

muted

#79787C

Preview Lab

Preview with #101557

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

Preview Lab → · Contrast checker → · Palette generator →