#171C7B#171C7B

#171C7B is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.155 H 270.4°. Best body text is #FFFFFF at 14.11:1 contrast (WCAG AA passes).

Color values

HEX	#171C7B
RGB	rgb(23, 28, 123)
HSL	hsl(237, 68%, 29%)
HSV	hsv(237, 81%, 48%)
CMYK	cmyk(81.3%, 77.2%, 0%, 51.8%)
CIE-LAB	lab(17.66, 33.68, -53.69)
CIE-LCH	lch(17.66, 63.38, 302.10°)
OKLab	oklab(30.43% 0.0012 -0.1555)
OKLCH	oklch(30.43% 0.156 270.4)
XYZ	xyz(4.3425, 2.4422, 18.9776)
Luminance	0.0244 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C7B #7B7617

analogous

#174E7B #171C7B #44177B

triadic

#171C7B #7B171C #1C7B17

tetradic

#171C7B #7B174E #7B7617 #177B44

square

#171C7B #7B174E #7B7617 #177B44

split-complementary

#171C7B #7B4417 #4E7B17

monochromatic

#05061A #0D1047 #171C7B #2128AF #333CD9

Accessibility & contrast

On white

14.11

#171C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#171C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C7B

14.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C7B	#FFFFFF	#000000	##FFFFFF
##171C7B	1.00	14.11	1.49	14.11
#FFFFFF	14.11	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307E

Deuteranopia (green-blind)

#002679

Tritanopia (blue-blind)

#00384A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171c7b;
/* rgb */ color: rgb(23, 28, 123);
/* oklch */ color: oklch(30.4% 0.155 270.4);

Tailwind

colors: {
  custom: {
    50: '#6859a2',
    500: '#171c7b',
    950: '#000000',
  },
}

SCSS

$custom: #171c7b;
$custom-light: #6859a2;
$custom-dark: #000000;

JSON

{
  "hex": "#171c7b",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 123
  },
  "hsl": {
    "h": 237,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30431,
    "c": 0.1555,
    "h": 270.4
  },
  "luminance": 0.02443
}

Semantic roles & 50–950 ramp

primary

#171C7B

secondary

#B0AA3E

accent

#E33CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171C7B

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

Preview Lab → · Contrast checker → · Palette generator →