#171E71#171E71

#171E71 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.6% C 0.140 H 270.7°. Best body text is #FFFFFF at 14.38:1 contrast (WCAG AA passes).

Color values

HEX	#171E71
RGB	rgb(23, 30, 113)
HSL	hsl(235, 66%, 27%)
HSV	hsv(235, 80%, 44%)
CMYK	cmyk(79.6%, 73.5%, 0%, 55.7%)
CIE-LAB	lab(17.00, 28.68, -48.34)
CIE-LCH	lch(17.00, 56.21, 300.68°)
OKLab	oklab(29.63% 0.0017 -0.1399)
OKLCH	oklch(29.63% 0.14 270.7)
XYZ	xyz(3.7972, 2.3025, 15.8639)
Luminance	0.0230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E71 #716A17

analogous

#174B71 #171E71 #3D1771

triadic

#171E71 #71171E #1E7117

tetradic

#171E71 #71174B #716A17 #17713D

square

#171E71 #71174B #716A17 #17713D

split-complementary

#171E71 #713D17 #4B7117

monochromatic

#050719 #0D113E #171E71 #212CA4 #2E3BD4

Accessibility & contrast

On white

14.38

#171E71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#171E71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E71

14.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E71	#FFFFFF	#000000	##FFFFFF
##171E71	1.00	14.38	1.46	14.38
#FFFFFF	14.38	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E74

Deuteranopia (green-blind)

#00266F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171e71;
/* rgb */ color: rgb(23, 30, 113);
/* oklch */ color: oklch(29.6% 0.140 270.7);

Tailwind

colors: {
  custom: {
    50: '#655a9b',
    500: '#171e71',
    950: '#000000',
  },
}

SCSS

$custom: #171e71;
$custom-light: #655a9b;
$custom-dark: #000000;

JSON

{
  "hex": "#171e71",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 113
  },
  "hsl": {
    "h": 235.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.2963,
    "c": 0.13995,
    "h": 270.7
  },
  "luminance": 0.02303
}

Semantic roles & 50–950 ramp

primary

#171E71

secondary

#A79E3D

accent

#DC3FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #171E71

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

Preview Lab → · Contrast checker → · Palette generator →