#172F74#172F74

#172F74 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.3% C 0.123 H 265.5°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#172F74
RGB	rgb(23, 47, 116)
HSL	hsl(225, 67%, 27%)
HSV	hsv(225, 80%, 45%)
CMYK	cmyk(80.2%, 59.5%, 0%, 54.5%)
CIE-LAB	lab(21.86, 17.99, -42.32)
CIE-LCH	lch(21.86, 45.99, 293.03°)
OKLab	oklab(33.3% -0.0096 -0.1221)
OKLCH	oklch(33.3% 0.123 265.5)
XYZ	xyz(4.5211, 3.4756, 16.9522)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F74 #745C17

analogous

#175E74 #172F74 #2E1774

triadic

#172F74 #74172F #2F7417

tetradic

#172F74 #74175E #745C17 #17742E

square

#172F74 #74175E #745C17 #17742E

split-complementary

#172F74 #742E17 #5E7417

monochromatic

#050A1A #0D1A41 #172F74 #2144A7 #305AD6

Accessibility & contrast

On white

12.39

#172F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#172F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F74

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F74	#FFFFFF	#000000	##FFFFFF
##172F74	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003976

Deuteranopia (green-blind)

#003073

Tritanopia (blue-blind)

#00404C

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172f74;
/* rgb */ color: rgb(23, 47, 116);
/* oklch */ color: oklch(33.3% 0.123 265.5);

Tailwind

colors: {
  custom: {
    50: '#64679d',
    500: '#172f74',
    950: '#000000',
  },
}

SCSS

$custom: #172f74;
$custom-light: #64679d;
$custom-dark: #000000;

JSON

{
  "hex": "#172f74",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 116
  },
  "hsl": {
    "h": 224.516,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.33296,
    "c": 0.12253,
    "h": 265.5
  },
  "luminance": 0.03476
}

Semantic roles & 50–950 ramp

primary

#172F74

secondary

#A98E3D

accent

#BD3EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #172F74

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

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