#171C57#171C57

#171C57 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.105 H 273.1°. Best body text is #FFFFFF at 15.67:1 contrast (WCAG AA passes).

Color values

HEX	#171C57
RGB	rgb(23, 28, 87)
HSL	hsl(235, 58%, 22%)
HSV	hsv(235, 74%, 34%)
CMYK	cmyk(73.6%, 67.8%, 0%, 65.9%)
CIE-LAB	lab(13.83, 19.89, -36.37)
CIE-LCH	lch(13.83, 41.45, 298.67°)
OKLab	oklab(26.51% 0.0057 -0.1049)
OKLCH	oklch(26.51% 0.105 273.1)
XYZ	xyz(2.4883, 1.7006, 9.2121)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C57 #575217

analogous

#173C57 #171C57 #321757

triadic

#171C57 #57171C #1C5717

tetradic

#171C57 #57173C #575217 #175732

square

#171C57 #57173C #575217 #175732

split-complementary

#171C57 #573217 #3C5717

monochromatic

#060818 #0A0C27 #171C57 #242C87 #313BB8

Accessibility & contrast

On white

15.67

#171C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C57

15.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C57	#FFFFFF	#000000	##FFFFFF
##171C57	1.00	15.67	1.34	15.67
#FFFFFF	15.67	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002659

Deuteranopia (green-blind)

#002056

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171c57;
/* rgb */ color: rgb(23, 28, 87);
/* oklch */ color: oklch(26.5% 0.105 273.1);

Tailwind

colors: {
  custom: {
    50: '#5e5887',
    500: '#171c57',
    950: '#000000',
  },
}

SCSS

$custom: #171c57;
$custom-light: #5e5887;
$custom-dark: #000000;

JSON

{
  "hex": "#171c57",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 87
  },
  "hsl": {
    "h": 235.313,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.26514,
    "c": 0.10508,
    "h": 273.1
  },
  "luminance": 0.01701
}

Semantic roles & 50–950 ramp

primary

#171C57

secondary

#8E883C

accent

#D546E1

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171C57

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

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