#10172B#10172B

#10172B is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.9% C 0.041 H 268.1°. Best body text is #FFFFFF at 17.81:1 contrast (WCAG AA passes).

Color values

HEX	#10172B
RGB	rgb(16, 23, 43)
HSL	hsl(224, 46%, 12%)
HSV	hsv(224, 63%, 17%)
CMYK	cmyk(62.8%, 46.5%, 0%, 83.1%)
CIE-LAB	lab(8.10, 4.03, -14.58)
CIE-LCH	lch(8.10, 15.12, 285.45°)
OKLab	oklab(20.92% -0.0013 -0.0412)
OKLCH	oklch(20.92% 0.041 268.1)
XYZ	xyz(0.9560, 0.8973, 2.4079)
Luminance	0.0090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10172B #2B2410

analogous

#10252B #10172B #17102B

triadic

#10172B #2B1017 #172B10

tetradic

#10172B #2B1025 #2B2410 #102B17

square

#10172B #2B1025 #2B2410 #102B17

split-complementary

#10172B #2B1710 #252B10

monochromatic

#080C16 #080C16 #10172B #212F58 #314784

Accessibility & contrast

On white

17.81

#10172B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#10172B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10172B

17.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10172B	#FFFFFF	#000000	##FFFFFF
##10172B	1.00	17.81	1.18	17.81
#FFFFFF	17.81	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F192C

Deuteranopia (green-blind)

#0C172B

Tritanopia (blue-blind)

#051B1E

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #10172b;
/* rgb */ color: rgb(16, 23, 43);
/* oklch */ color: oklch(20.9% 0.041 268.1);

Tailwind

colors: {
  custom: {
    50: '#505364',
    500: '#10172b',
    950: '#000000',
  },
}

SCSS

$custom: #10172b;
$custom-light: #505364;
$custom-dark: #000000;

JSON

{
  "hex": "#10172b",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 43
  },
  "hsl": {
    "h": 224.444,
    "s": 45.763,
    "l": 11.569
  },
  "oklch": {
    "l": 0.2092,
    "c": 0.0412,
    "h": 268.1
  },
  "luminance": 0.00897
}

Semantic roles & 50–950 ramp

primary

#10172B

secondary

#645733

accent

#B352D5

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020205

muted

#78787A

Preview Lab

Preview with #10172B

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

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