#172A55#172A55

#172A55 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.5% C 0.082 H 264.1°. Best body text is #FFFFFF at 14.01:1 contrast (WCAG AA passes).

Color values

HEX	#172A55
RGB	rgb(23, 42, 85)
HSL	hsl(222, 57%, 21%)
HSV	hsv(222, 73%, 33%)
CMYK	cmyk(72.9%, 50.6%, 0%, 66.7%)
CIE-LAB	lab(17.89, 8.72, -28.45)
CIE-LCH	lch(17.89, 29.75, 287.04°)
OKLab	oklab(29.51% -0.0084 -0.0814)
OKLCH	oklch(29.51% 0.082 264.1)
XYZ	xyz(2.8204, 2.4937, 8.9253)
Luminance	0.0249 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A55 #554217

analogous

#174955 #172A55 #231755

triadic

#172A55 #55172A #2A5517

tetradic

#172A55 #551749 #554217 #175523

square

#172A55 #551749 #554217 #175523

split-complementary

#172A55 #552317 #495517

monochromatic

#070C18 #0A1225 #172A55 #244285 #315AB5

Accessibility & contrast

On white

14.01

#172A55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#172A55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A55

14.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A55	#FFFFFF	#000000	##FFFFFF
##172A55	1.00	14.01	1.50	14.01
#FFFFFF	14.01	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#142F57

Deuteranopia (green-blind)

#082954

Tritanopia (blue-blind)

#00343B

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172a55;
/* rgb */ color: rgb(23, 42, 85);
/* oklch */ color: oklch(29.5% 0.082 264.1);

Tailwind

colors: {
  custom: {
    50: '#5c6385',
    500: '#172a55',
    950: '#000000',
  },
}

SCSS

$custom: #172a55;
$custom-light: #5c6385;
$custom-dark: #000000;

JSON

{
  "hex": "#172a55",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 85
  },
  "hsl": {
    "h": 221.613,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.29514,
    "c": 0.08186,
    "h": 264.1
  },
  "luminance": 0.02494
}

Semantic roles & 50–950 ramp

primary

#172A55

secondary

#8C733C

accent

#B247E1

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#04050B

muted

#79797C

Preview Lab

Preview with #172A55

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

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