#172C55#172C55

#172C55 is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.0% C 0.079 H 262.3°. Best body text is #FFFFFF at 13.75:1 contrast (WCAG AA passes).

Color values

HEX	#172C55
RGB	rgb(23, 44, 85)
HSL	hsl(220, 57%, 21%)
HSV	hsv(220, 73%, 33%)
CMYK	cmyk(72.9%, 48.2%, 0%, 66.7%)
CIE-LAB	lab(18.54, 7.25, -27.41)
CIE-LCH	lch(18.54, 28.36, 284.82°)
OKLab	oklab(30.01% -0.0106 -0.0783)
OKLCH	oklch(30.01% 0.079 262.3)
XYZ	xyz(2.8931, 2.6391, 8.9495)
Luminance	0.0264 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C55 #554017

analogous

#174B55 #172C55 #211755

triadic

#172C55 #55172C #2C5517

tetradic

#172C55 #55174B #554017 #175521

square

#172C55 #55174B #554017 #175521

split-complementary

#172C55 #552117 #4B5517

monochromatic

#070C18 #0A1325 #172C55 #244585 #315EB5

Accessibility & contrast

On white

13.75

#172C55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#172C55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C55

13.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C55	#FFFFFF	#000000	##FFFFFF
##172C55	1.00	13.75	1.53	13.75
#FFFFFF	13.75	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#183057

Deuteranopia (green-blind)

#0D2A54

Tritanopia (blue-blind)

#00353C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172c55;
/* rgb */ color: rgb(23, 44, 85);
/* oklch */ color: oklch(30.0% 0.079 262.3);

Tailwind

colors: {
  custom: {
    50: '#5c6485',
    500: '#172c55',
    950: '#000000',
  },
}

SCSS

$custom: #172c55;
$custom-light: #5c6485;
$custom-dark: #000000;

JSON

{
  "hex": "#172c55",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 85
  },
  "hsl": {
    "h": 219.677,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.3001,
    "c": 0.07907,
    "h": 262.3
  },
  "luminance": 0.02639
}

Semantic roles & 50–950 ramp

primary

#172C55

secondary

#8C713C

accent

#AD47E1

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#04050B

muted

#79797C

Preview Lab

Preview with #172C55

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

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