#171D58#171D58

#171D58 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.105 H 272.6°. Best body text is #FFFFFF at 15.52:1 contrast (WCAG AA passes).

Color values

HEX	#171D58
RGB	rgb(23, 29, 88)
HSL	hsl(234, 59%, 22%)
HSV	hsv(234, 74%, 35%)
CMYK	cmyk(73.9%, 67%, 0%, 65.5%)
CIE-LAB	lab(14.20, 19.57, -36.43)
CIE-LCH	lch(14.20, 41.35, 298.24°)
OKLab	oklab(26.82% 0.0048 -0.1051)
OKLCH	oklch(26.82% 0.105 272.6)
XYZ	xyz(2.5536, 1.7652, 9.4368)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D58 #585217

analogous

#173E58 #171D58 #321758

triadic

#171D58 #58171D #1D5817

tetradic

#171D58 #58173E #585217 #175832

square

#171D58 #58173E #585217 #175832

split-complementary

#171D58 #583217 #3E5817

monochromatic

#060818 #0A0D27 #171D58 #242D89 #303DB9

Accessibility & contrast

On white

15.52

#171D58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171D58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D58

15.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D58	#FFFFFF	#000000	##FFFFFF
##171D58	1.00	15.52	1.35	15.52
#FFFFFF	15.52	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275A

Deuteranopia (green-blind)

#002157

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171d58;
/* rgb */ color: rgb(23, 29, 88);
/* oklch */ color: oklch(26.8% 0.105 272.6);

Tailwind

colors: {
  custom: {
    50: '#5e5888',
    500: '#171d58',
    950: '#000000',
  },
}

SCSS

$custom: #171d58;
$custom-light: #5e5888;
$custom-dark: #000000;

JSON

{
  "hex": "#171d58",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 88
  },
  "hsl": {
    "h": 234.462,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.26819,
    "c": 0.10522,
    "h": 272.6
  },
  "luminance": 0.01765
}

Semantic roles & 50–950 ramp

primary

#171D58

secondary

#8F873C

accent

#D346E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171D58

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

Preview Lab → · Contrast checker → · Palette generator →