#172F53#172F53

#172F53 is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.6% C 0.072 H 258.4°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#172F53
RGB	rgb(23, 47, 83)
HSL	hsl(216, 57%, 21%)
HSV	hsv(216, 72%, 33%)
CMYK	cmyk(72.3%, 43.4%, 0%, 67.5%)
CIE-LAB	lab(19.39, 4.25, -24.71)
CIE-LCH	lch(19.39, 25.08, 279.75°)
OKLab	oklab(30.63% -0.0145 -0.0704)
OKLCH	oklch(30.63% 0.072 258.4)
XYZ	xyz(2.9306, 2.8394, 8.5756)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F53 #533B17

analogous

#174D53 #172F53 #1D1753

triadic

#172F53 #53172F #2F5317

tetradic

#172F53 #53174D #533B17 #17531D

square

#172F53 #53174D #533B17 #17531D

split-complementary

#172F53 #531D17 #4D5317

monochromatic

#070E18 #0A1423 #172F53 #244A83 #3265B3

Accessibility & contrast

On white

13.39

#172F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F53

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F53	#FFFFFF	#000000	##FFFFFF
##172F53	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3254

Deuteranopia (green-blind)

#162C52

Tritanopia (blue-blind)

#00373D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172f53;
/* rgb */ color: rgb(23, 47, 83);
/* oklch */ color: oklch(30.6% 0.072 258.4);

Tailwind

colors: {
  custom: {
    50: '#5c6783',
    500: '#172f53',
    950: '#000000',
  },
}

SCSS

$custom: #172f53;
$custom-light: #5c6783;
$custom-dark: #000000;

JSON

{
  "hex": "#172f53",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 83
  },
  "hsl": {
    "h": 216,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.30626,
    "c": 0.07186,
    "h": 258.4
  },
  "luminance": 0.0284
}

Semantic roles & 50–950 ramp

primary

#172F53

secondary

#8A6B3C

accent

#A348E0

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060A

muted

#797A7C

Preview Lab

Preview with #172F53

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

Preview Lab → · Contrast checker → · Palette generator →