#171B7A#171B7A

#171B7A is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.2% C 0.155 H 270.6°. Best body text is #FFFFFF at 14.25:1 contrast (WCAG AA passes).

Color values

HEX	#171B7A
RGB	rgb(23, 27, 122)
HSL	hsl(238, 68%, 28%)
HSV	hsv(238, 81%, 48%)
CMYK	cmyk(81.1%, 77.9%, 0%, 52.2%)
CIE-LAB	lab(17.32, 33.93, -53.60)
CIE-LCH	lch(17.32, 63.44, 302.33°)
OKLab	oklab(30.16% 0.0018 -0.1552)
OKLCH	oklch(30.16% 0.155 270.6)
XYZ	xyz(4.2569, 2.3707, 18.6418)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7A #7A7617

analogous

#174C7A #171B7A #44177A

triadic

#171B7A #7A171B #1B7A17

tetradic

#171B7A #7A174C #7A7617 #177A44

square

#171B7A #7A174C #7A7617 #177A44

split-complementary

#171B7A #7A4417 #4C7A17

monochromatic

#05061A #0D1047 #171B7A #2126AD #333AD9

Accessibility & contrast

On white

14.25

#171B7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#171B7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7A

14.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7A	#FFFFFF	#000000	##FFFFFF
##171B7A	1.00	14.25	1.47	14.25
#FFFFFF	14.25	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7D

Deuteranopia (green-blind)

#002678

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171b7a;
/* rgb */ color: rgb(23, 27, 122);
/* oklch */ color: oklch(30.2% 0.155 270.6);

Tailwind

colors: {
  custom: {
    50: '#6858a2',
    500: '#171b7a',
    950: '#000000',
  },
}

SCSS

$custom: #171b7a;
$custom-light: #6858a2;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7a",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 122
  },
  "hsl": {
    "h": 237.576,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.30161,
    "c": 0.15524,
    "h": 270.6
  },
  "luminance": 0.02371
}

Semantic roles & 50–950 ramp

primary

#171B7A

secondary

#AFAA3E

accent

#E43DEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B7A

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

Preview Lab → · Contrast checker → · Palette generator →