#172B56#172B56

#172B56 is a dark, moderate blue. Relative luminance 0.026; OKLCH L 29.8% C 0.082 H 263.5°. Best body text is #FFFFFF at 13.85:1 contrast (WCAG AA passes).

Color values

HEX	#172B56
RGB	rgb(23, 43, 86)
HSL	hsl(221, 58%, 21%)
HSV	hsv(221, 73%, 34%)
CMYK	cmyk(73.3%, 50%, 0%, 66.3%)
CIE-LAB	lab(18.28, 8.40, -28.49)
CIE-LCH	lch(18.28, 29.70, 286.43°)
OKLab	oklab(29.84% -0.0093 -0.0815)
OKLCH	oklch(29.84% 0.082 263.5)
XYZ	xyz(2.8963, 2.5815, 9.1479)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B56 #564217

analogous

#174B56 #172B56 #231756

triadic

#172B56 #56172B #2B5617

tetradic

#172B56 #56174B #564217 #175623

square

#172B56 #56174B #564217 #175623

split-complementary

#172B56 #562317 #4B5617

monochromatic

#060C18 #0A1326 #172B56 #244386 #315BB7

Accessibility & contrast

On white

13.85

#172B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B56

13.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B56	#FFFFFF	#000000	##FFFFFF
##172B56	1.00	13.85	1.52	13.85
#FFFFFF	13.85	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#153058

Deuteranopia (green-blind)

#092A55

Tritanopia (blue-blind)

#00353C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172b56;
/* rgb */ color: rgb(23, 43, 86);
/* oklch */ color: oklch(29.8% 0.082 263.5);

Tailwind

colors: {
  custom: {
    50: '#5d6386',
    500: '#172b56',
    950: '#000000',
  },
}

SCSS

$custom: #172b56;
$custom-light: #5d6386;
$custom-dark: #000000;

JSON

{
  "hex": "#172b56",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 86
  },
  "hsl": {
    "h": 220.952,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.29838,
    "c": 0.08205,
    "h": 263.5
  },
  "luminance": 0.02582
}

Semantic roles & 50–950 ramp

primary

#172B56

secondary

#8D733C

accent

#B047E1

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#04050B

muted

#79797C

Preview Lab

Preview with #172B56

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

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