#172B85#172B85

#172B85 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.1% C 0.152 H 267.4°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).

Color values

HEX	#172B85
RGB	rgb(23, 43, 133)
HSL	hsl(229, 71%, 31%)
HSV	hsv(229, 83%, 52%)
CMYK	cmyk(82.7%, 67.7%, 0%, 47.8%)
CIE-LAB	lab(22.31, 27.66, -52.35)
CIE-LCH	lch(22.31, 59.21, 297.85°)
OKLab	oklab(34.11% -0.007 -0.1516)
OKLCH	oklch(34.11% 0.152 267.4)
XYZ	xyz(5.4494, 3.6027, 22.5939)
Luminance	0.0360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B85 #857117

analogous

#176285 #172B85 #3A1785

triadic

#172B85 #85172B #2B8517

tetradic

#172B85 #851762 #857117 #17853A

square

#172B85 #851762 #857117 #17853A

split-complementary

#172B85 #853A17 #628517

monochromatic

#05091D #0E1A51 #172B85 #203CB9 #3A57DD

Accessibility & contrast

On white

12.21

#172B85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#172B85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B85

12.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B85	#FFFFFF	#000000	##FFFFFF
##172B85	1.00	12.21	1.72	12.21
#FFFFFF	12.21	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B88

Deuteranopia (green-blind)

#003083

Tritanopia (blue-blind)

#004354

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172b85;
/* rgb */ color: rgb(23, 43, 133);
/* oklch */ color: oklch(34.1% 0.152 267.4);

Tailwind

colors: {
  custom: {
    50: '#6964a9',
    500: '#172b85',
    950: '#000000',
  },
}

SCSS

$custom: #172b85;
$custom-light: #6964a9;
$custom-dark: #000000;

JSON

{
  "hex": "#172b85",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 133
  },
  "hsl": {
    "h": 229.091,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.34114,
    "c": 0.15175,
    "h": 267.4
  },
  "luminance": 0.03603
}

Semantic roles & 50–950 ramp

primary

#172B85

secondary

#B9A33F

accent

#CD3BED

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#070510

muted

#7A797F

Preview Lab

Preview with #172B85

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

Preview Lab → · Contrast checker → · Palette generator →