#171F57#171F57

#171F57 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.1% C 0.101 H 271.7°. Best body text is #FFFFFF at 15.33:1 contrast (WCAG AA passes).

Color values

HEX	#171F57
RGB	rgb(23, 31, 87)
HSL	hsl(233, 58%, 22%)
HSV	hsv(233, 74%, 34%)
CMYK	cmyk(73.6%, 64.4%, 0%, 65.9%)
CIE-LAB	lab(14.68, 17.70, -34.98)
CIE-LCH	lch(14.68, 39.21, 296.84°)
OKLab	oklab(27.14% 0.003 -0.1008)
OKLCH	oklch(27.14% 0.101 271.7)
XYZ	xyz(2.5631, 1.8500, 9.2370)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F57 #574F17

analogous

#173F57 #171F57 #2F1757

triadic

#171F57 #57171F #1F5717

tetradic

#171F57 #57173F #574F17 #17572F

square

#171F57 #57173F #574F17 #17572F

split-complementary

#171F57 #572F17 #3F5717

monochromatic

#060918 #0A0E27 #171F57 #243087 #3141B8

Accessibility & contrast

On white

15.33

#171F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#171F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F57

15.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F57	#FFFFFF	#000000	##FFFFFF
##171F57	1.00	15.33	1.37	15.33
#FFFFFF	15.33	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002859

Deuteranopia (green-blind)

#002256

Tritanopia (blue-blind)

#002D37

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171f57;
/* rgb */ color: rgb(23, 31, 87);
/* oklch */ color: oklch(27.1% 0.101 271.7);

Tailwind

colors: {
  custom: {
    50: '#5e5a87',
    500: '#171f57',
    950: '#000000',
  },
}

SCSS

$custom: #171f57;
$custom-light: #5e5a87;
$custom-dark: #000000;

JSON

{
  "hex": "#171f57",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 87
  },
  "hsl": {
    "h": 232.5,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.27142,
    "c": 0.10087,
    "h": 271.7
  },
  "luminance": 0.0185
}

Semantic roles & 50–950 ramp

primary

#171F57

secondary

#8E843C

accent

#CE46E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171F57

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

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