#100F31#100F31

#100F31 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.4% C 0.066 H 279.7°. Best body text is #FFFFFF at 18.51:1 contrast (WCAG AA passes).

Color values

HEX	#100F31
RGB	rgb(16, 15, 49)
HSL	hsl(242, 53%, 13%)
HSV	hsv(242, 69%, 19%)
CMYK	cmyk(67.3%, 69.4%, 0%, 80.8%)
CIE-LAB	lab(6.08, 12.09, -22.24)
CIE-LCH	lch(6.08, 25.31, 298.53°)
OKLab	oklab(19.41% 0.011 -0.0646)
OKLCH	oklch(19.41% 0.066 279.7)
XYZ	xyz(0.9387, 0.6735, 2.9857)
Luminance	0.0067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.80

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F31 #30310F

analogous

#0F1F31 #100F31 #210F31

triadic

#100F31 #31100F #0F3110

tetradic

#100F31 #310F1F #30310F #0F3121

square

#100F31 #310F1F #30310F #0F3121

split-complementary

#100F31 #31210F #1F310F

monochromatic

#080717 #080717 #100F31 #1F1D60 #2F2C8F

Accessibility & contrast

On white

18.51

#100F31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#100F31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F31

18.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F31	#FFFFFF	#000000	##FFFFFF
##100F31	1.00	18.51	1.13	18.51
#FFFFFF	18.51	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001532

Deuteranopia (green-blind)

#001230

Tritanopia (blue-blind)

#02171E

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #100f31;
/* rgb */ color: rgb(16, 15, 49);
/* oklch */ color: oklch(19.4% 0.066 279.7);

Tailwind

colors: {
  custom: {
    50: '#524d69',
    500: '#100f31',
    950: '#000000',
  },
}

SCSS

$custom: #100f31;
$custom-light: #524d69;
$custom-dark: #000000;

JSON

{
  "hex": "#100f31",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 49
  },
  "hsl": {
    "h": 241.765,
    "s": 53.125,
    "l": 12.549
  },
  "oklch": {
    "l": 0.19406,
    "c": 0.06557,
    "h": 279.7
  },
  "luminance": 0.00674
}

Semantic roles & 50–950 ramp

primary

#100F31

secondary

#696B31

accent

#DD4BD8

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020106

muted

#78777A

Preview Lab

Preview with #100F31

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

Preview Lab → · Contrast checker → · Palette generator →