#172A57#172A57

#172A57 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.7% C 0.085 H 264.6°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#172A57
RGB	rgb(23, 42, 87)
HSL	hsl(222, 58%, 22%)
HSV	hsv(222, 74%, 34%)
CMYK	cmyk(73.6%, 51.7%, 0%, 65.9%)
CIE-LAB	lab(18.04, 9.55, -29.55)
CIE-LCH	lch(18.04, 31.06, 287.91°)
OKLab	oklab(29.67% -0.0081 -0.0847)
OKLCH	oklch(29.67% 0.085 264.6)
XYZ	xyz(2.9010, 2.5259, 9.3496)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A57 #574417

analogous

#174A57 #172A57 #241757

triadic

#172A57 #57172A #2A5717

tetradic

#172A57 #57174A #574417 #175724

square

#172A57 #57174A #574417 #175724

split-complementary

#172A57 #572417 #4A5717

monochromatic

#060C18 #0A1327 #172A57 #244187 #3159B8

Accessibility & contrast

On white

13.95

#172A57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172A57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A57

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A57	#FFFFFF	#000000	##FFFFFF
##172A57	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#122F59

Deuteranopia (green-blind)

#042956

Tritanopia (blue-blind)

#00343C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172a57;
/* rgb */ color: rgb(23, 42, 87);
/* oklch */ color: oklch(29.7% 0.085 264.6);

Tailwind

colors: {
  custom: {
    50: '#5d6387',
    500: '#172a57',
    950: '#000000',
  },
}

SCSS

$custom: #172a57;
$custom-light: #5d6387;
$custom-dark: #000000;

JSON

{
  "hex": "#172a57",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 87
  },
  "hsl": {
    "h": 222.188,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.29672,
    "c": 0.08506,
    "h": 264.6
  },
  "luminance": 0.02526
}

Semantic roles & 50–950 ramp

primary

#172A57

secondary

#8E763C

accent

#B346E1

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172A57

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

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