#172857#172857

#172857 is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.2% C 0.088 H 266.1°. Best body text is #FFFFFF at 14.21:1 contrast (WCAG AA passes).

Color values

HEX	#172857
RGB	rgb(23, 40, 87)
HSL	hsl(224, 58%, 22%)
HSV	hsv(224, 74%, 34%)
CMYK	cmyk(73.6%, 54%, 0%, 65.9%)
CIE-LAB	lab(17.40, 11.03, -30.57)
CIE-LCH	lch(17.40, 32.50, 289.84°)
OKLab	oklab(29.19% -0.0059 -0.0877)
OKLCH	oklch(29.19% 0.088 266.1)
XYZ	xyz(2.8318, 2.3876, 9.3266)
Luminance	0.0239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172857 #574617

analogous

#174857 #172857 #261757

triadic

#172857 #571728 #285717

tetradic

#172857 #571748 #574617 #175726

square

#172857 #571748 #574617 #175726

split-complementary

#172857 #572617 #485717

monochromatic

#060B18 #0A1227 #172857 #243E87 #3155B8

Accessibility & contrast

On white

14.21

#172857 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172857 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172857

14.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172857	#FFFFFF	#000000	##FFFFFF
##172857	1.00	14.21	1.48	14.21
#FFFFFF	14.21	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D2E59

Deuteranopia (green-blind)

#002856

Tritanopia (blue-blind)

#00333B

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172857;
/* rgb */ color: rgb(23, 40, 87);
/* oklch */ color: oklch(29.2% 0.088 266.1);

Tailwind

colors: {
  custom: {
    50: '#5d6187',
    500: '#172857',
    950: '#000000',
  },
}

SCSS

$custom: #172857;
$custom-light: #5d6187;
$custom-dark: #000000;

JSON

{
  "hex": "#172857",
  "rgb": {
    "r": 23,
    "g": 40,
    "b": 87
  },
  "hsl": {
    "h": 224.063,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.29189,
    "c": 0.08791,
    "h": 266.1
  },
  "luminance": 0.02388
}

Semantic roles & 50–950 ramp

primary

#172857

secondary

#8E783C

accent

#B846E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172857

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

Preview Lab → · Contrast checker → · Palette generator →