#171A71#171A71

#171A71 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.0% C 0.144 H 271.5°. Best body text is #FFFFFF at 14.76:1 contrast (WCAG AA passes).

Color values

HEX	#171A71
RGB	rgb(23, 26, 113)
HSL	hsl(238, 66%, 27%)
HSV	hsv(238, 80%, 44%)
CMYK	cmyk(79.6%, 77%, 0%, 55.7%)
CIE-LAB	lab(16.07, 31.27, -49.88)
CIE-LCH	lch(16.07, 58.87, 302.08°)
OKLab	oklab(28.96% 0.0038 -0.1444)
OKLCH	oklch(28.96% 0.144 271.5)
XYZ	xyz(3.7024, 2.1128, 15.8323)
Luminance	0.0211 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171A71 #716E17

analogous

#174771 #171A71 #411771

triadic

#171A71 #71171A #1A7117

tetradic

#171A71 #711747 #716E17 #177141

square

#171A71 #711747 #716E17 #177141

split-complementary

#171A71 #714117 #477117

monochromatic

#050619 #0D0E3E #171A71 #2126A4 #2E34D4

Accessibility & contrast

On white

14.76

#171A71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171A71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171A71

14.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171A71	#FFFFFF	#000000	##FFFFFF
##171A71	1.00	14.76	1.42	14.76
#FFFFFF	14.76	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C74

Deuteranopia (green-blind)

#00236F

Tritanopia (blue-blind)

#003344

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171a71;
/* rgb */ color: rgb(23, 26, 113);
/* oklch */ color: oklch(29.0% 0.144 271.5);

Tailwind

colors: {
  custom: {
    50: '#65579b',
    500: '#171a71',
    950: '#000000',
  },
}

SCSS

$custom: #171a71;
$custom-light: #65579b;
$custom-dark: #000000;

JSON

{
  "hex": "#171a71",
  "rgb": {
    "r": 23,
    "g": 26,
    "b": 113
  },
  "hsl": {
    "h": 238,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.28962,
    "c": 0.14445,
    "h": 271.5
  },
  "luminance": 0.02113
}

Semantic roles & 50–950 ramp

primary

#171A71

secondary

#A7A33D

accent

#E33FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171A71

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

Preview Lab → · Contrast checker → · Palette generator →