#100F37#100F37

#100F37 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.0% C 0.076 H 278.2°. Best body text is #FFFFFF at 18.33:1 contrast (WCAG AA passes).

Color values

HEX	#100F37
RGB	rgb(16, 15, 55)
HSL	hsl(242, 57%, 14%)
HSV	hsv(242, 73%, 22%)
CMYK	cmyk(70.9%, 72.7%, 0%, 78.4%)
CIE-LAB	lab(6.57, 14.90, -25.85)
CIE-LCH	lch(6.57, 29.84, 299.96°)
OKLab	oklab(20.01% 0.0108 -0.0748)
OKLCH	oklch(20.01% 0.076 278.2)
XYZ	xyz(1.0739, 0.7276, 3.6975)
Luminance	0.0073 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F37 #36370F

analogous

#0F2237 #100F37 #240F37

triadic

#100F37 #37100F #0F3710

tetradic

#100F37 #370F22 #36370F #0F3724

square

#100F37 #370F22 #36370F #0F3724

split-complementary

#100F37 #37240F #22370F

monochromatic

#070718 #070718 #100F37 #1E1C67 #2C2997

Accessibility & contrast

On white

18.33

#100F37 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#100F37 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F37

18.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F37	#FFFFFF	#000000	##FFFFFF
##100F37	1.00	18.33	1.15	18.33
#FFFFFF	18.33	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001638

Deuteranopia (green-blind)

#001336

Tritanopia (blue-blind)

#001921

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #100f37;
/* rgb */ color: rgb(16, 15, 55);
/* oklch */ color: oklch(20.0% 0.076 278.2);

Tailwind

colors: {
  custom: {
    50: '#534d6e',
    500: '#100f37',
    950: '#000000',
  },
}

SCSS

$custom: #100f37;
$custom-light: #534d6e;
$custom-dark: #000000;

JSON

{
  "hex": "#100f37",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 55
  },
  "hsl": {
    "h": 241.5,
    "s": 57.143,
    "l": 13.725
  },
  "oklch": {
    "l": 0.20006,
    "c": 0.07562,
    "h": 278.2
  },
  "luminance": 0.00728
}

Semantic roles & 50–950 ramp

primary

#100F37

secondary

#707131

accent

#E047DD

background

#F4F4F6

surface

#E8E7EC

border

#C4C3C7

text

#030107

muted

#78777A

Preview Lab

Preview with #100F37

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

Preview Lab → · Contrast checker → · Palette generator →