#171B8C#171B8C

#171B8C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.3% C 0.178 H 269.5°. Best body text is #FFFFFF at 13.36:1 contrast (WCAG AA passes).

Color values

HEX	#171B8C
RGB	rgb(23, 27, 140)
HSL	hsl(238, 72%, 32%)
HSV	hsv(238, 84%, 55%)
CMYK	cmyk(83.6%, 80.7%, 0%, 45.1%)
CIE-LAB	lab(19.47, 40.24, -61.43)
CIE-LCH	lch(19.47, 73.44, 303.23°)
OKLab	oklab(32.3% -0.0016 -0.1779)
OKLCH	oklch(32.3% 0.178 269.5)
XYZ	xyz(5.4773, 2.8588, 25.0690)
Luminance	0.0286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B8C #8C8817

analogous

#17568C #171B8C #4E178C

triadic

#171B8C #8C171B #1B8C17

tetradic

#171B8C #8C1756 #8C8817 #178C4E

square

#171B8C #8C1756 #8C8817 #178C4E

split-complementary

#171B8C #8C4E17 #568C17

monochromatic

#060723 #0E1157 #171B8C #2025C1 #3E44DF

Accessibility & contrast

On white

13.36

#171B8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#171B8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B8C

13.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B8C	#FFFFFF	#000000	##FFFFFF
##171B8C	1.00	13.36	1.57	13.36
#FFFFFF	13.36	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358F

Deuteranopia (green-blind)

#00298A

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #171b8c;
/* rgb */ color: rgb(23, 27, 140);
/* oklch */ color: oklch(32.3% 0.178 269.5);

Tailwind

colors: {
  custom: {
    50: '#6d5aaf',
    500: '#171b8c',
    950: '#000000',
  },
}

SCSS

$custom: #171b8c;
$custom-light: #6d5aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#171b8c",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 140
  },
  "hsl": {
    "h": 237.949,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32301,
    "c": 0.17793,
    "h": 269.5
  },
  "luminance": 0.02859
}

Semantic roles & 50–950 ramp

primary

#171B8C

secondary

#BFBB3F

accent

#E839EF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #171B8C

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

Preview Lab → · Contrast checker → · Palette generator →