#101537#101537

#101537 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.4% C 0.066 H 273.2°. Best body text is #FFFFFF at 17.73:1 contrast (WCAG AA passes).

Color values

HEX	#101537
RGB	rgb(16, 21, 55)
HSL	hsl(232, 55%, 14%)
HSV	hsv(232, 71%, 22%)
CMYK	cmyk(70.9%, 61.8%, 0%, 78.4%)
CIE-LAB	lab(8.33, 10.63, -23.01)
CIE-LCH	lch(8.33, 25.35, 294.80°)
OKLab	oklab(21.38% 0.0037 -0.066)
OKLCH	oklch(21.38% 0.066 273.2)
XYZ	xyz(1.1712, 0.9222, 3.7300)
Luminance	0.0092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.29

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101537 #373210

analogous

#102937 #101537 #1F1037

triadic

#101537 #371015 #153710

tetradic

#101537 #371029 #373210 #10371F

square

#101537 #371029 #373210 #10371F

split-complementary

#101537 #371F10 #293710

monochromatic

#070918 #070918 #101537 #1E2766 #2C3996

Accessibility & contrast

On white

17.73

#101537 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#101537 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101537

17.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101537	#FFFFFF	#000000	##FFFFFF
##101537	1.00	17.73	1.18	17.73
#FFFFFF	17.73	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031A38

Deuteranopia (green-blind)

#001736

Tritanopia (blue-blind)

#001D23

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #101537;
/* rgb */ color: rgb(16, 21, 55);
/* oklch */ color: oklch(21.4% 0.066 273.2);

Tailwind

colors: {
  custom: {
    50: '#53516e',
    500: '#101537',
    950: '#000000',
  },
}

SCSS

$custom: #101537;
$custom-light: #53516e;
$custom-dark: #000000;

JSON

{
  "hex": "#101537",
  "rgb": {
    "r": 16,
    "g": 21,
    "b": 55
  },
  "hsl": {
    "h": 232.308,
    "s": 54.93,
    "l": 13.922
  },
  "oklch": {
    "l": 0.21379,
    "c": 0.06606,
    "h": 273.2
  },
  "luminance": 0.00922
}

Semantic roles & 50–950 ramp

primary

#101537

secondary

#716932

accent

#CB4ADE

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #101537

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

Preview Lab → · Contrast checker → · Palette generator →