#10173F#10173F

#10173F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.6% C 0.076 H 271.4°. Best body text is #FFFFFF at 17.26:1 contrast (WCAG AA passes).

Color values

HEX	#10173F
RGB	rgb(16, 23, 63)
HSL	hsl(231, 59%, 15%)
HSV	hsv(231, 75%, 25%)
CMYK	cmyk(74.6%, 63.5%, 0%, 75.3%)
CIE-LAB	lab(9.65, 12.48, -26.60)
CIE-LCH	lch(9.65, 29.38, 295.14°)
OKLab	oklab(22.6% 0.0019 -0.0765)
OKLCH	oklch(22.6% 0.076 271.4)
XYZ	xyz(1.4170, 1.0817, 4.8358)
Luminance	0.0108 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10173F #3F3810

analogous

#102E3F #10173F #20103F

triadic

#10173F #3F1017 #173F10

tetradic

#10173F #3F102E #3F3810 #103F20

square

#10173F #3F102E #3F3810 #103F20

split-complementary

#10173F #3F2010 #2E3F10

monochromatic

#060918 #060918 #10173F #1C2970 #293BA1

Accessibility & contrast

On white

17.26

#10173F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#10173F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10173F

17.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10173F	#FFFFFF	#000000	##FFFFFF
##10173F	1.00	17.26	1.22	17.26
#FFFFFF	17.26	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00193E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10173f;
/* rgb */ color: rgb(16, 23, 63);
/* oklch */ color: oklch(22.6% 0.076 271.4);

Tailwind

colors: {
  custom: {
    50: '#555374',
    500: '#10173f',
    950: '#000000',
  },
}

SCSS

$custom: #10173f;
$custom-light: #555374;
$custom-dark: #000000;

JSON

{
  "hex": "#10173f",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 63
  },
  "hsl": {
    "h": 231.064,
    "s": 59.494,
    "l": 15.49
  },
  "oklch": {
    "l": 0.22596,
    "c": 0.07649,
    "h": 271.4
  },
  "luminance": 0.01082
}

Semantic roles & 50–950 ramp

primary

#10173F

secondary

#796E32

accent

#CB45E3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #10173F

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

Preview Lab → · Contrast checker → · Palette generator →