#172B8F#172B8F

#172B8F is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.1% C 0.165 H 267.4°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#172B8F
RGB	rgb(23, 43, 143)
HSL	hsl(230, 72%, 33%)
HSV	hsv(230, 84%, 56%)
CMYK	cmyk(83.9%, 69.9%, 0%, 43.9%)
CIE-LAB	lab(23.31, 31.54, -56.94)
CIE-LCH	lch(23.31, 65.09, 298.98°)
OKLab	oklab(35.15% -0.0076 -0.165)
OKLCH	oklch(35.15% 0.165 267.4)
XYZ	xyz(6.1734, 3.8923, 26.4072)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B8F #8F7B17

analogous

#17678F #172B8F #3F178F

triadic

#172B8F #8F172B #2B8F17

tetradic

#172B8F #8F1767 #8F7B17 #178F3F

square

#172B8F #8F1767 #8F7B17 #178F3F

split-complementary

#172B8F #8F3F17 #678F17

monochromatic

#060B26 #0F1B5A #172B8F #1F3BC4 #405BE0

Accessibility & contrast

On white

11.81

#172B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#172B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B8F

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B8F	#FFFFFF	#000000	##FFFFFF
##172B8F	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D92

Deuteranopia (green-blind)

#00328D

Tritanopia (blue-blind)

#004759

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #172b8f;
/* rgb */ color: rgb(23, 43, 143);
/* oklch */ color: oklch(35.1% 0.165 267.4);

Tailwind

colors: {
  custom: {
    50: '#6c64b1',
    500: '#172b8f',
    950: '#000000',
  },
}

SCSS

$custom: #172b8f;
$custom-light: #6c64b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172b8f",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 143
  },
  "hsl": {
    "h": 230,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.35148,
    "c": 0.16518,
    "h": 267.4
  },
  "luminance": 0.03893
}

Semantic roles & 50–950 ramp

primary

#172B8F

secondary

#C1AB41

accent

#D139EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080511

muted

#7B7A80

Preview Lab

Preview with #172B8F

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

Preview Lab → · Contrast checker → · Palette generator →