#172DA1#172DA1

#172DA1 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 37.4% C 0.186 H 266.9°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#172DA1
RGB	rgb(23, 45, 161)
HSL	hsl(230, 75%, 36%)
HSV	hsv(230, 86%, 63%)
CMYK	cmyk(85.7%, 72%, 0%, 36.9%)
CIE-LAB	lab(25.66, 37.00, -64.13)
CIE-LCH	lch(25.66, 74.04, 299.99°)
OKLab	oklab(37.41% -0.0099 -0.1859)
OKLCH	oklch(37.41% 0.186 266.9)
XYZ	xyz(7.7225, 4.6312, 34.1982)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172DA1 #A18B17

analogous

#1772A1 #172DA1 #4617A1

triadic

#172DA1 #A1172D #2DA117

tetradic

#172DA1 #A11772 #A18B17 #17A146

square

#172DA1 #A11772 #A18B17 #17A146

split-complementary

#172DA1 #A14617 #72A117

monochromatic

#080F36 #0F1E6B #172DA1 #1F3CD7 #4D65E6

Accessibility & contrast

On white

10.90

#172DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#172DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172DA1

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172DA1	#FFFFFF	#000000	##FFFFFF
##172DA1	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A4

Deuteranopia (green-blind)

#00369F

Tritanopia (blue-blind)

#004E64

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #172da1;
/* rgb */ color: rgb(23, 45, 161);
/* oklch */ color: oklch(37.4% 0.186 266.9);

Tailwind

colors: {
  custom: {
    50: '#7166be',
    500: '#172da1',
    950: '#000000',
  },
}

SCSS

$custom: #172da1;
$custom-light: #7166be;
$custom-dark: #000000;

JSON

{
  "hex": "#172da1",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 161
  },
  "hsl": {
    "h": 230.435,
    "s": 75,
    "l": 36.078
  },
  "oklch": {
    "l": 0.37407,
    "c": 0.18617,
    "h": 266.9
  },
  "luminance": 0.04632
}

Semantic roles & 50–950 ramp

primary

#172DA1

secondary

#C7B44C

accent

#D436F2

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #172DA1

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

Preview Lab → · Contrast checker → · Palette generator →