#171C7E#171C7E

#171C7E is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.8% C 0.159 H 270.2°. Best body text is #FFFFFF at 13.96:1 contrast (WCAG AA passes).

Color values

HEX	#171C7E
RGB	rgb(23, 28, 126)
HSL	hsl(237, 69%, 29%)
HSV	hsv(237, 82%, 49%)
CMYK	cmyk(81.7%, 77.8%, 0%, 50.6%)
CIE-LAB	lab(18.00, 34.76, -55.03)
CIE-LCH	lch(18.00, 65.09, 302.28°)
OKLab	oklab(30.78% 0.0007 -0.1594)
OKLCH	oklch(30.78% 0.159 270.2)
XYZ	xyz(4.5332, 2.5185, 19.9818)
Luminance	0.0252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C7E #7E7917

analogous

#17507E #171C7E #46177E

triadic

#171C7E #7E171C #1C7E17

tetradic

#171C7E #7E1750 #7E7917 #177E46

square

#171C7E #7E1750 #7E7917 #177E46

split-complementary

#171C7E #7E4617 #507E17

monochromatic

#05061A #0E104A #171C7E #2028B2 #353DDA

Accessibility & contrast

On white

13.96

#171C7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#171C7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C7E

13.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C7E	#FFFFFF	#000000	##FFFFFF
##171C7E	1.00	13.96	1.50	13.96
#FFFFFF	13.96	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003181

Deuteranopia (green-blind)

#00277C

Tritanopia (blue-blind)

#00394C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171c7e;
/* rgb */ color: rgb(23, 28, 126);
/* oklch */ color: oklch(30.8% 0.159 270.2);

Tailwind

colors: {
  custom: {
    50: '#6959a5',
    500: '#171c7e',
    950: '#000000',
  },
}

SCSS

$custom: #171c7e;
$custom-light: #6959a5;
$custom-dark: #000000;

JSON

{
  "hex": "#171c7e",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 126
  },
  "hsl": {
    "h": 237.087,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.30779,
    "c": 0.15939,
    "h": 270.2
  },
  "luminance": 0.02519
}

Semantic roles & 50–950 ramp

primary

#171C7E

secondary

#B3AD3E

accent

#E33CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171C7E

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

Preview Lab → · Contrast checker → · Palette generator →