#172FA1#172FA1

#172FA1 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.7% C 0.184 H 266.7°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#172FA1
RGB	rgb(23, 47, 161)
HSL	hsl(230, 75%, 36%)
HSV	hsv(230, 86%, 63%)
CMYK	cmyk(85.7%, 70.8%, 0%, 36.9%)
CIE-LAB	lab(26.12, 35.73, -63.36)
CIE-LCH	lch(26.12, 72.74, 299.42°)
OKLab	oklab(37.74% -0.0106 -0.1837)
OKLCH	oklch(37.74% 0.184 266.7)
XYZ	xyz(7.8006, 4.7874, 34.2242)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172FA1 #A18917

analogous

#1774A1 #172FA1 #4417A1

triadic

#172FA1 #A1172F #2FA117

tetradic

#172FA1 #A11774 #A18917 #17A144

square

#172FA1 #A11774 #A18917 #17A144

split-complementary

#172FA1 #A14417 #74A117

monochromatic

#081036 #0F1F6B #172FA1 #1F3FD7 #4D67E6

Accessibility & contrast

On white

10.73

#172FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#172FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172FA1

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172FA1	#FFFFFF	#000000	##FFFFFF
##172FA1	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A4

Deuteranopia (green-blind)

#00379F

Tritanopia (blue-blind)

#004F64

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #172fa1;
/* rgb */ color: rgb(23, 47, 161);
/* oklch */ color: oklch(37.7% 0.184 266.7);

Tailwind

colors: {
  custom: {
    50: '#7168be',
    500: '#172fa1',
    950: '#000000',
  },
}

SCSS

$custom: #172fa1;
$custom-light: #7168be;
$custom-dark: #000000;

JSON

{
  "hex": "#172fa1",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 161
  },
  "hsl": {
    "h": 229.565,
    "s": 75,
    "l": 36.078
  },
  "oklch": {
    "l": 0.37742,
    "c": 0.184,
    "h": 266.7
  },
  "luminance": 0.04788
}

Semantic roles & 50–950 ramp

primary

#172FA1

secondary

#C7B24C

accent

#D136F2

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #172FA1

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

Preview Lab → · Contrast checker → · Palette generator →