#171B80#171B80

#171B80 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.9% C 0.163 H 270.2°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#171B80
RGB	rgb(23, 27, 128)
HSL	hsl(238, 70%, 30%)
HSV	hsv(238, 82%, 50%)
CMYK	cmyk(82%, 78.9%, 0%, 49.8%)
CIE-LAB	lab(18.03, 36.07, -56.26)
CIE-LCH	lch(18.03, 66.83, 302.67°)
OKLab	oklab(30.87% 0.0007 -0.163)
OKLCH	oklch(30.87% 0.163 270.2)
XYZ	xyz(4.6402, 2.5240, 20.6605)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B80 #807C17

analogous

#175080 #171B80 #471780

triadic

#171B80 #80171B #1B8017

tetradic

#171B80 #801750 #807C17 #178047

square

#171B80 #801750 #807C17 #178047

split-complementary

#171B80 #804717 #508017

monochromatic

#05051A #0E104C #171B80 #2026B4 #363DDB

Accessibility & contrast

On white

13.95

#171B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B80

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B80	#FFFFFF	#000000	##FFFFFF
##171B80	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003183

Deuteranopia (green-blind)

#00277E

Tritanopia (blue-blind)

#00394C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171b80;
/* rgb */ color: rgb(23, 27, 128);
/* oklch */ color: oklch(30.9% 0.163 270.2);

Tailwind

colors: {
  custom: {
    50: '#6959a6',
    500: '#171b80',
    950: '#000000',
  },
}

SCSS

$custom: #171b80;
$custom-light: #6959a6;
$custom-dark: #000000;

JSON

{
  "hex": "#171b80",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 128
  },
  "hsl": {
    "h": 237.714,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.30866,
    "c": 0.16295,
    "h": 270.2
  },
  "luminance": 0.02525
}

Semantic roles & 50–950 ramp

primary

#171B80

secondary

#B4B03E

accent

#E63BEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #171B80

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

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