#172E57#172E57

#172E57 is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.7% C 0.080 H 261.0°. Best body text is #FFFFFF at 13.42:1 contrast (WCAG AA passes).

Color values

HEX	#172E57
RGB	rgb(23, 46, 87)
HSL	hsl(218, 58%, 22%)
HSV	hsv(218, 74%, 34%)
CMYK	cmyk(73.6%, 47.1%, 0%, 65.9%)
CIE-LAB	lab(19.32, 6.63, -27.49)
CIE-LCH	lch(19.32, 28.27, 283.55°)
OKLab	oklab(30.66% -0.0124 -0.0785)
OKLCH	oklch(30.66% 0.08 261)
XYZ	xyz(3.0500, 2.8240, 9.3993)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E57 #574017

analogous

#174E57 #172E57 #201757

triadic

#172E57 #57172E #2E5717

tetradic

#172E57 #57174E #574017 #175720

square

#172E57 #57174E #574017 #175720

split-complementary

#172E57 #572017 #4E5717

monochromatic

#060D18 #0A1427 #172E57 #244887 #3161B8

Accessibility & contrast

On white

13.42

#172E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#172E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E57

13.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E57	#FFFFFF	#000000	##FFFFFF
##172E57	1.00	13.42	1.56	13.42
#FFFFFF	13.42	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3259

Deuteranopia (green-blind)

#0F2C56

Tritanopia (blue-blind)

#00373E

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172e57;
/* rgb */ color: rgb(23, 46, 87);
/* oklch */ color: oklch(30.7% 0.080 261.0);

Tailwind

colors: {
  custom: {
    50: '#5d6687',
    500: '#172e57',
    950: '#000000',
  },
}

SCSS

$custom: #172e57;
$custom-light: #5d6687;
$custom-dark: #000000;

JSON

{
  "hex": "#172e57",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 87
  },
  "hsl": {
    "h": 218.438,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.30662,
    "c": 0.07951,
    "h": 261
  },
  "luminance": 0.02824
}

Semantic roles & 50–950 ramp

primary

#172E57

secondary

#8E703C

accent

#AA46E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04050B

muted

#797A7C

Preview Lab

Preview with #172E57

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

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