#10172C#10172C

#10172C is a very dark, muted blue. Relative luminance 0.009; OKLCH L 21.0% C 0.043 H 268.6°. Best body text is #FFFFFF at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#10172C
RGB	rgb(16, 23, 44)
HSL	hsl(225, 47%, 12%)
HSV	hsv(225, 64%, 17%)
CMYK	cmyk(63.6%, 47.7%, 0%, 82.7%)
CIE-LAB	lab(8.17, 4.44, -15.21)
CIE-LCH	lch(8.17, 15.85, 286.27°)
OKLab	oklab(20.99% -0.0011 -0.043)
OKLCH	oklch(20.99% 0.043 268.6)
XYZ	xyz(0.9746, 0.9047, 2.5057)
Luminance	0.0091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10172C #2C2510

analogous

#10252C #10172C #17102C

triadic

#10172C #2C1017 #172C10

tetradic

#10172C #2C1025 #2C2510 #102C17

square

#10172C #2C1025 #2C2510 #102C17

split-complementary

#10172C #2C1710 #252C10

monochromatic

#080C16 #080C16 #10172C #202E59 #314686

Accessibility & contrast

On white

17.78

#10172C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#10172C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10172C

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10172C	#FFFFFF	#000000	##FFFFFF
##10172C	1.00	17.78	1.18	17.78
#FFFFFF	17.78	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F192D

Deuteranopia (green-blind)

#0C172C

Tritanopia (blue-blind)

#041C1F

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #10172c;
/* rgb */ color: rgb(16, 23, 44);
/* oklch */ color: oklch(21.0% 0.043 268.6);

Tailwind

colors: {
  custom: {
    50: '#505365',
    500: '#10172c',
    950: '#000000',
  },
}

SCSS

$custom: #10172c;
$custom-light: #505365;
$custom-dark: #000000;

JSON

{
  "hex": "#10172c",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 44
  },
  "hsl": {
    "h": 225,
    "s": 46.667,
    "l": 11.765
  },
  "oklch": {
    "l": 0.20993,
    "c": 0.04305,
    "h": 268.6
  },
  "luminance": 0.00905
}

Semantic roles & 50–950 ramp

primary

#10172C

secondary

#655833

accent

#B551D6

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020205

muted

#78787A

Preview Lab

Preview with #10172C

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

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