#172B53#172B53

#172B53 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.6% C 0.077 H 262.6°. Best body text is #FFFFFF at 13.94:1 contrast (WCAG AA passes).

Color values

HEX	#172B53
RGB	rgb(23, 43, 83)
HSL	hsl(220, 57%, 21%)
HSV	hsv(220, 72%, 33%)
CMYK	cmyk(72.3%, 48.2%, 0%, 67.5%)
CIE-LAB	lab(18.07, 7.15, -26.81)
CIE-LCH	lch(18.07, 27.75, 284.94°)
OKLab	oklab(29.61% -0.0099 -0.0766)
OKLCH	oklch(29.61% 0.077 262.6)
XYZ	xyz(2.7780, 2.5342, 8.5247)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B53 #533F17

analogous

#174953 #172B53 #211753

triadic

#172B53 #53172B #2B5317

tetradic

#172B53 #531749 #533F17 #175321

square

#172B53 #531749 #533F17 #175321

split-complementary

#172B53 #532117 #495317

monochromatic

#070C18 #0A1223 #172B53 #244483 #325DB3

Accessibility & contrast

On white

13.94

#172B53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172B53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B53

13.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B53	#FFFFFF	#000000	##FFFFFF
##172B53	1.00	13.94	1.51	13.94
#FFFFFF	13.94	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#182F55

Deuteranopia (green-blind)

#0E2A52

Tritanopia (blue-blind)

#00343B

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172b53;
/* rgb */ color: rgb(23, 43, 83);
/* oklch */ color: oklch(29.6% 0.077 262.6);

Tailwind

colors: {
  custom: {
    50: '#5c6384',
    500: '#172b53',
    950: '#000000',
  },
}

SCSS

$custom: #172b53;
$custom-light: #5c6384;
$custom-dark: #000000;

JSON

{
  "hex": "#172b53",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 83
  },
  "hsl": {
    "h": 220,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.29608,
    "c": 0.07725,
    "h": 262.6
  },
  "luminance": 0.02534
}

Semantic roles & 50–950 ramp

primary

#172B53

secondary

#8A703C

accent

#AD48E0

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#04050B

muted

#79797C

Preview Lab

Preview with #172B53

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

Preview Lab → · Contrast checker → · Palette generator →