#172B83#172B83

#172B83 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.9% C 0.149 H 267.3°. Best body text is #FFFFFF at 12.28:1 contrast (WCAG AA passes).

Color values

HEX	#172B83
RGB	rgb(23, 43, 131)
HSL	hsl(229, 70%, 30%)
HSV	hsv(229, 82%, 51%)
CMYK	cmyk(82.4%, 67.2%, 0%, 48.6%)
CIE-LAB	lab(22.12, 26.87, -51.41)
CIE-LCH	lch(22.12, 58.01, 297.60°)
OKLab	oklab(33.91% -0.0069 -0.1488)
OKLCH	oklch(33.91% 0.149 267.3)
XYZ	xyz(5.3125, 3.5480, 21.8732)
Luminance	0.0355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B83 #836F17

analogous

#176183 #172B83 #391783

triadic

#172B83 #83172B #2B8317

tetradic

#172B83 #831761 #836F17 #178339

square

#172B83 #831761 #836F17 #178339

split-complementary

#172B83 #833917 #618317

monochromatic

#05091B #0E1A4F #172B83 #203CB7 #3857DC

Accessibility & contrast

On white

12.28

#172B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#172B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B83

12.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B83	#FFFFFF	#000000	##FFFFFF
##172B83	1.00	12.28	1.71	12.28
#FFFFFF	12.28	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A86

Deuteranopia (green-blind)

#003081

Tritanopia (blue-blind)

#004353

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172b83;
/* rgb */ color: rgb(23, 43, 131);
/* oklch */ color: oklch(33.9% 0.149 267.3);

Tailwind

colors: {
  custom: {
    50: '#6964a8',
    500: '#172b83',
    950: '#000000',
  },
}

SCSS

$custom: #172b83;
$custom-light: #6964a8;
$custom-dark: #000000;

JSON

{
  "hex": "#172b83",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 131
  },
  "hsl": {
    "h": 228.889,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.33911,
    "c": 0.14901,
    "h": 267.3
  },
  "luminance": 0.03549
}

Semantic roles & 50–950 ramp

primary

#172B83

secondary

#B7A13F

accent

#CC3BED

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#070510

muted

#7A797F

Preview Lab

Preview with #172B83

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

Preview Lab → · Contrast checker → · Palette generator →