#173E9E#173E9E

#173E9E is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.162 H 263.8°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#173E9E
RGB	rgb(23, 62, 158)
HSL	hsl(223, 75%, 35%)
HSV	hsv(223, 85%, 62%)
CMYK	cmyk(85.4%, 60.8%, 0%, 38%)
CIE-LAB	lab(29.65, 24.57, -55.75)
CIE-LCH	lch(29.65, 60.92, 293.78°)
OKLab	oklab(40.26% -0.0176 -0.1613)
OKLCH	oklch(40.26% 0.162 263.8)
XYZ	xyz(8.2453, 6.0950, 33.0830)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E9E #9E7717

analogous

#17819E #173E9E #34179E

triadic

#173E9E #9E173E #3E9E17

tetradic

#173E9E #9E1781 #9E7717 #179E34

square

#173E9E #9E1781 #9E7717 #179E34

split-complementary

#173E9E #9E3417 #819E17

monochromatic

#071433 #0F2969 #173E9E #1F53D3 #4B77E5

Accessibility & contrast

On white

9.46

#173E9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#173E9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E9E

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E9E	#FFFFFF	#000000	##FFFFFF
##173E9E	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #173e9e;
/* rgb */ color: rgb(23, 62, 158);
/* oklch */ color: oklch(40.3% 0.162 263.8);

Tailwind

colors: {
  custom: {
    50: '#6e72bb',
    500: '#173e9e',
    950: '#000000',
  },
}

SCSS

$custom: #173e9e;
$custom-light: #6e72bb;
$custom-dark: #000000;

JSON

{
  "hex": "#173e9e",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 158
  },
  "hsl": {
    "h": 222.667,
    "s": 74.586,
    "l": 35.49
  },
  "oklch": {
    "l": 0.40256,
    "c": 0.16226,
    "h": 263.8
  },
  "luminance": 0.06096
}

Semantic roles & 50–950 ramp

primary

#173E9E

secondary

#C6A34A

accent

#BB37F1

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #173E9E

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

Preview Lab → · Contrast checker → · Palette generator →