#173E8C#173E8C

#173E8C is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.137 H 262.1°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#173E8C
RGB	rgb(23, 62, 140)
HSL	hsl(220, 72%, 32%)
HSV	hsv(220, 84%, 55%)
CMYK	cmyk(83.6%, 55.7%, 0%, 45.1%)
CIE-LAB	lab(28.17, 17.27, -47.15)
CIE-LCH	lch(28.17, 50.21, 290.12°)
OKLab	oklab(38.68% -0.0188 -0.136)
OKLCH	oklch(38.68% 0.137 262.1)
XYZ	xyz(6.8079, 5.5200, 25.5125)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E8C #8C6517

analogous

#17798C #173E8C #2B178C

triadic

#173E8C #8C173E #3E8C17

tetradic

#173E8C #8C1779 #8C6517 #178C2B

square

#173E8C #8C1779 #8C6517 #178C2B

split-complementary

#173E8C #8C2B17 #798C17

monochromatic

#060F23 #0E2757 #173E8C #2055C1 #3E74DF

Accessibility & contrast

On white

9.98

#173E8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#173E8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E8C

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E8C	#FFFFFF	#000000	##FFFFFF
##173E8C	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488F

Deuteranopia (green-blind)

#003D8A

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #173e8c;
/* rgb */ color: rgb(23, 62, 140);
/* oklch */ color: oklch(38.7% 0.137 262.1);

Tailwind

colors: {
  custom: {
    50: '#6a72ae',
    500: '#173e8c',
    950: '#000000',
  },
}

SCSS

$custom: #173e8c;
$custom-light: #6a72ae;
$custom-dark: #000000;

JSON

{
  "hex": "#173e8c",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 140
  },
  "hsl": {
    "h": 220,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38676,
    "c": 0.13734,
    "h": 262.1
  },
  "luminance": 0.05521
}

Semantic roles & 50–950 ramp

primary

#173E8C

secondary

#BF953F

accent

#B239EF

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #173E8C

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

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