#171E57#171E57

#171E57 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.102 H 272.2°. Best body text is #FFFFFF at 15.44:1 contrast (WCAG AA passes).

Color values

HEX	#171E57
RGB	rgb(23, 30, 87)
HSL	hsl(233, 58%, 22%)
HSV	hsv(233, 74%, 34%)
CMYK	cmyk(73.6%, 65.5%, 0%, 65.9%)
CIE-LAB	lab(14.39, 18.43, -35.45)
CIE-LCH	lch(14.39, 39.96, 297.47°)
OKLab	oklab(26.93% 0.0039 -0.1022)
OKLCH	oklch(26.93% 0.102 272.2)
XYZ	xyz(2.5373, 1.7986, 9.2284)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E57 #575017

analogous

#173E57 #171E57 #301757

triadic

#171E57 #57171E #1E5717

tetradic

#171E57 #57173E #575017 #175730

square

#171E57 #57173E #575017 #175730

split-complementary

#171E57 #573017 #3E5717

monochromatic

#060818 #0A0D27 #171E57 #242F87 #313FB8

Accessibility & contrast

On white

15.44

#171E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E57

15.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E57	#FFFFFF	#000000	##FFFFFF
##171E57	1.00	15.44	1.36	15.44
#FFFFFF	15.44	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002759

Deuteranopia (green-blind)

#002256

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171e57;
/* rgb */ color: rgb(23, 30, 87);
/* oklch */ color: oklch(26.9% 0.102 272.2);

Tailwind

colors: {
  custom: {
    50: '#5e5987',
    500: '#171e57',
    950: '#000000',
  },
}

SCSS

$custom: #171e57;
$custom-light: #5e5987;
$custom-dark: #000000;

JSON

{
  "hex": "#171e57",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 87
  },
  "hsl": {
    "h": 233.438,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.26929,
    "c": 0.10229,
    "h": 272.2
  },
  "luminance": 0.01799
}

Semantic roles & 50–950 ramp

primary

#171E57

secondary

#8E853C

accent

#D046E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171E57

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

Preview Lab → · Contrast checker → · Palette generator →