#172C80#172C80

#172C80 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.8% C 0.144 H 267.1°. Best body text is #FFFFFF at 12.29:1 contrast (WCAG AA passes).

Color values

HEX	#172C80
RGB	rgb(23, 44, 128)
HSL	hsl(228, 70%, 30%)
HSV	hsv(228, 82%, 50%)
CMYK	cmyk(82%, 65.6%, 0%, 49.8%)
CIE-LAB	lab(22.09, 24.99, -49.56)
CIE-LCH	lch(22.09, 55.51, 296.76°)
OKLab	oklab(33.81% -0.0074 -0.1434)
OKLCH	oklch(33.81% 0.144 267.1)
XYZ	xyz(5.1490, 3.5414, 20.8301)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C80 #806B17

analogous

#176180 #172C80 #371780

triadic

#172C80 #80172C #2C8017

tetradic

#172C80 #801761 #806B17 #178037

square

#172C80 #801761 #806B17 #178037

split-complementary

#172C80 #803717 #618017

monochromatic

#05091A #0E1A4C #172C80 #203EB4 #3657DB

Accessibility & contrast

On white

12.29

#172C80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#172C80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C80

12.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C80	#FFFFFF	#000000	##FFFFFF
##172C80	1.00	12.29	1.71	12.29
#FFFFFF	12.29	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A83

Deuteranopia (green-blind)

#00307E

Tritanopia (blue-blind)

#004251

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172c80;
/* rgb */ color: rgb(23, 44, 128);
/* oklch */ color: oklch(33.8% 0.144 267.1);

Tailwind

colors: {
  custom: {
    50: '#6865a6',
    500: '#172c80',
    950: '#000000',
  },
}

SCSS

$custom: #172c80;
$custom-light: #6865a6;
$custom-dark: #000000;

JSON

{
  "hex": "#172c80",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 128
  },
  "hsl": {
    "h": 228,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.33806,
    "c": 0.14362,
    "h": 267.1
  },
  "luminance": 0.03542
}

Semantic roles & 50–950 ramp

primary

#172C80

secondary

#B49D3E

accent

#C93BEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172C80

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

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