#10173A#10173A

#10173A is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.068 H 271.3°. Best body text is #FFFFFF at 17.42:1 contrast (WCAG AA passes).

Color values

HEX	#10173A
RGB	rgb(16, 23, 58)
HSL	hsl(230, 57%, 15%)
HSV	hsv(230, 72%, 23%)
CMYK	cmyk(72.4%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(9.22, 10.34, -23.72)
CIE-LCH	lch(9.22, 25.88, 293.55°)
OKLab	oklab(22.14% 0.0015 -0.068)
OKLCH	oklch(22.14% 0.068 271.3)
XYZ	xyz(1.2835, 1.0283, 4.1330)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10173A #3A3310

analogous

#102C3A #10173A #1E103A

triadic

#10173A #3A1017 #173A10

tetradic

#10173A #3A102C #3A3310 #103A1E

square

#10173A #3A102C #3A3310 #103A1E

split-complementary

#10173A #3A1E10 #2C3A10

monochromatic

#070A18 #070A18 #10173A #1D2A6A #2A3D9A

Accessibility & contrast

On white

17.42

#10173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#10173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10173A

17.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10173A	#FFFFFF	#000000	##FFFFFF
##10173A	1.00	17.42	1.21	17.42
#FFFFFF	17.42	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041C3B

Deuteranopia (green-blind)

#001839

Tritanopia (blue-blind)

#001F25

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #10173a;
/* rgb */ color: rgb(16, 23, 58);
/* oklch */ color: oklch(22.1% 0.068 271.3);

Tailwind

colors: {
  custom: {
    50: '#545370',
    500: '#10173a',
    950: '#000000',
  },
}

SCSS

$custom: #10173a;
$custom-light: #545370;
$custom-dark: #000000;

JSON

{
  "hex": "#10173a",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 230,
    "s": 56.757,
    "l": 14.51
  },
  "oklch": {
    "l": 0.22137,
    "c": 0.06804,
    "h": 271.3
  },
  "luminance": 0.01028
}

Semantic roles & 50–950 ramp

primary

#10173A

secondary

#746932

accent

#C748E0

background

#F5F4F6

surface

#E8E7EC

border

#C4C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #10173A

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

Preview Lab → · Contrast checker → · Palette generator →