#10173E#10173E

#10173E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.5% C 0.075 H 271.4°. Best body text is #FFFFFF at 17.30:1 contrast (WCAG AA passes).

Color values

HEX	#10173E
RGB	rgb(16, 23, 62)
HSL	hsl(231, 59%, 15%)
HSV	hsv(231, 74%, 24%)
CMYK	cmyk(74.2%, 62.9%, 0%, 75.7%)
CIE-LAB	lab(9.57, 12.05, -26.03)
CIE-LCH	lch(9.57, 28.68, 294.85°)
OKLab	oklab(22.5% 0.0019 -0.0748)
OKLCH	oklch(22.5% 0.075 271.4)
XYZ	xyz(1.3893, 1.0706, 4.6899)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10173E #3E3710

analogous

#102E3E #10173E #20103E

triadic

#10173E #3E1017 #173E10

tetradic

#10173E #3E102E #3E3710 #103E20

square

#10173E #3E102E #3E3710 #103E20

split-complementary

#10173E #3E2010 #2E3E10

monochromatic

#060918 #060918 #10173E #1D296F #293B9F

Accessibility & contrast

On white

17.30

#10173E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#10173E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10173E

17.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10173E	#FFFFFF	#000000	##FFFFFF
##10173E	1.00	17.30	1.21	17.30
#FFFFFF	17.30	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D3F

Deuteranopia (green-blind)

#00193D

Tritanopia (blue-blind)

#002027

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #10173e;
/* rgb */ color: rgb(16, 23, 62);
/* oklch */ color: oklch(22.5% 0.075 271.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#10173e",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 62
  },
  "hsl": {
    "h": 230.87,
    "s": 58.974,
    "l": 15.294
  },
  "oklch": {
    "l": 0.22502,
    "c": 0.07482,
    "h": 271.4
  },
  "luminance": 0.01071
}

Semantic roles & 50–950 ramp

primary

#10173E

secondary

#786D32

accent

#CA46E2

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #10173E

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

Preview Lab → · Contrast checker → · Palette generator →