#171B63#171B63

#171B63 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.6% C 0.124 H 272.5°. Best body text is #FFFFFF at 15.29:1 contrast (WCAG AA passes).

Color values

HEX	#171B63
RGB	rgb(23, 27, 99)
HSL	hsl(237, 62%, 24%)
HSV	hsv(237, 77%, 39%)
CMYK	cmyk(76.8%, 72.7%, 0%, 61.2%)
CIE-LAB	lab(14.77, 25.32, -42.85)
CIE-LCH	lch(14.77, 49.77, 300.58°)
OKLab	oklab(27.57% 0.0054 -0.1239)
OKLCH	oklch(27.57% 0.124 272.5)
XYZ	xyz(2.9967, 1.8666, 12.0043)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B63 #635F17

analogous

#174163 #171B63 #391763

triadic

#171B63 #63171B #1B6317

tetradic

#171B63 #631741 #635F17 #176339

square

#171B63 #631741 #635F17 #176339

split-complementary

#171B63 #633917 #416317

monochromatic

#060719 #0B0D31 #171B63 #232995 #2E36C6

Accessibility & contrast

On white

15.29

#171B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#171B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B63

15.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B63	#FFFFFF	#000000	##FFFFFF
##171B63	1.00	15.29	1.37	15.29
#FFFFFF	15.29	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002965

Deuteranopia (green-blind)

#002262

Tritanopia (blue-blind)

#002F3C

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171b63;
/* rgb */ color: rgb(23, 27, 99);
/* oklch */ color: oklch(27.6% 0.124 272.5);

Tailwind

colors: {
  custom: {
    50: '#615790',
    500: '#171b63',
    950: '#000000',
  },
}

SCSS

$custom: #171b63;
$custom-light: #615790;
$custom-dark: #000000;

JSON

{
  "hex": "#171b63",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 99
  },
  "hsl": {
    "h": 236.842,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.2757,
    "c": 0.12402,
    "h": 272.5
  },
  "luminance": 0.01867
}

Semantic roles & 50–950 ramp

primary

#171B63

secondary

#9A953C

accent

#DD42E5

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #171B63

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

Preview Lab → · Contrast checker → · Palette generator →