#172B58#172B58

#172B58 is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.0% C 0.085 H 264.0°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#172B58
RGB	rgb(23, 43, 88)
HSL	hsl(222, 59%, 22%)
HSV	hsv(222, 74%, 35%)
CMYK	cmyk(73.9%, 51.1%, 0%, 65.5%)
CIE-LAB	lab(18.43, 9.24, -29.59)
CIE-LCH	lch(18.43, 31.00, 287.33°)
OKLab	oklab(30% -0.009 -0.0848)
OKLCH	oklch(30% 0.085 264)
XYZ	xyz(2.9781, 2.6142, 9.5783)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B58 #584417

analogous

#174C58 #172B58 #231758

triadic

#172B58 #58172B #2B5817

tetradic

#172B58 #58174C #584417 #175823

square

#172B58 #58174C #584417 #175823

split-complementary

#172B58 #582317 #4C5817

monochromatic

#060C18 #0A1327 #172B58 #244389 #305AB9

Accessibility & contrast

On white

13.79

#172B58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172B58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B58

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B58	#FFFFFF	#000000	##FFFFFF
##172B58	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13305A

Deuteranopia (green-blind)

#062A57

Tritanopia (blue-blind)

#00353D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172b58;
/* rgb */ color: rgb(23, 43, 88);
/* oklch */ color: oklch(30.0% 0.085 264.0);

Tailwind

colors: {
  custom: {
    50: '#5d6387',
    500: '#172b58',
    950: '#000000',
  },
}

SCSS

$custom: #172b58;
$custom-light: #5d6387;
$custom-dark: #000000;

JSON

{
  "hex": "#172b58",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 88
  },
  "hsl": {
    "h": 221.538,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.29995,
    "c": 0.08524,
    "h": 264
  },
  "luminance": 0.02614
}

Semantic roles & 50–950 ramp

primary

#172B58

secondary

#8F753C

accent

#B246E2

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172B58

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

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