#100F57#100F57

#100F57 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.7% C 0.123 H 272.4°. Best body text is #FFFFFF at 17.10:1 contrast (WCAG AA passes).

Color values

HEX	#100F57
RGB	rgb(16, 15, 87)
HSL	hsl(241, 71%, 20%)
HSV	hsv(241, 83%, 34%)
CMYK	cmyk(81.6%, 82.8%, 0%, 65.9%)
CIE-LAB	lab(10.10, 27.87, -42.51)
CIE-LCH	lch(10.10, 50.84, 303.25°)
OKLab	oklab(23.7% 0.0052 -0.123)
OKLCH	oklch(23.7% 0.123 272.4)
XYZ	xyz(2.1042, 1.1397, 9.1241)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F57 #56570F

analogous

#0F3257 #100F57 #340F57

triadic

#100F57 #57100F #0F5710

tetradic

#100F57 #570F32 #56570F #0F5734

square

#100F57 #570F32 #56570F #0F5734

split-complementary

#100F57 #57340F #32570F

monochromatic

#05051A #060623 #100F57 #1A188B #2321BF

Accessibility & contrast

On white

17.10

#100F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#100F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F57

17.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F57	#FFFFFF	#000000	##FFFFFF
##100F57	1.00	17.10	1.23	17.10
#FFFFFF	17.10	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F59

Deuteranopia (green-blind)

#001856

Tritanopia (blue-blind)

#002532

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #100f57;
/* rgb */ color: rgb(16, 15, 87);
/* oklch */ color: oklch(23.7% 0.123 272.4);

Tailwind

colors: {
  custom: {
    50: '#5d4e87',
    500: '#100f57',
    950: '#000000',
  },
}

SCSS

$custom: #100f57;
$custom-light: #5d4e87;
$custom-dark: #000000;

JSON

{
  "hex": "#100f57",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 87
  },
  "hsl": {
    "h": 240.833,
    "s": 70.588,
    "l": 20
  },
  "oklch": {
    "l": 0.23702,
    "c": 0.12315,
    "h": 272.4
  },
  "luminance": 0.0114
}

Semantic roles & 50–950 ramp

primary

#100F57

secondary

#8F9131

accent

#ED3AEB

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05020B

muted

#79787C

Preview Lab

Preview with #100F57

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

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