#171E58#171E58

#171E58 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.104 H 272.1°. Best body text is #FFFFFF at 15.41:1 contrast (WCAG AA passes).

Color values

HEX	#171E58
RGB	rgb(23, 30, 88)
HSL	hsl(234, 59%, 22%)
HSV	hsv(234, 74%, 35%)
CMYK	cmyk(73.9%, 65.9%, 0%, 65.5%)
CIE-LAB	lab(14.48, 18.84, -35.97)
CIE-LCH	lch(14.48, 40.61, 297.64°)
OKLab	oklab(27.03% 0.0039 -0.1037)
OKLCH	oklch(27.03% 0.104 272.1)
XYZ	xyz(2.5785, 1.8150, 9.4451)
Luminance	0.0181 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E58 #585117

analogous

#173F58 #171E58 #311758

triadic

#171E58 #58171E #1E5817

tetradic

#171E58 #58173F #585117 #175831

square

#171E58 #58173F #585117 #175831

split-complementary

#171E58 #583117 #3F5817

monochromatic

#060818 #0A0D27 #171E58 #242F89 #303FB9

Accessibility & contrast

On white

15.41

#171E58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171E58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E58

15.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E58	#FFFFFF	#000000	##FFFFFF
##171E58	1.00	15.41	1.36	15.41
#FFFFFF	15.41	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285A

Deuteranopia (green-blind)

#002257

Tritanopia (blue-blind)

#002D37

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171e58;
/* rgb */ color: rgb(23, 30, 88);
/* oklch */ color: oklch(27.0% 0.104 272.1);

Tailwind

colors: {
  custom: {
    50: '#5e5988',
    500: '#171e58',
    950: '#000000',
  },
}

SCSS

$custom: #171e58;
$custom-light: #5e5988;
$custom-dark: #000000;

JSON

{
  "hex": "#171e58",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 88
  },
  "hsl": {
    "h": 233.538,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.27026,
    "c": 0.10382,
    "h": 272.1
  },
  "luminance": 0.01815
}

Semantic roles & 50–950 ramp

primary

#171E58

secondary

#8F863C

accent

#D146E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171E58

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

Preview Lab → · Contrast checker → · Palette generator →