#171D7E#171D7E

#171D7E is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.9% C 0.158 H 270.1°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#171D7E
RGB	rgb(23, 29, 126)
HSL	hsl(237, 69%, 29%)
HSV	hsv(237, 82%, 49%)
CMYK	cmyk(81.7%, 77%, 0%, 50.6%)
CIE-LAB	lab(18.22, 34.16, -54.67)
CIE-LCH	lch(18.22, 64.47, 301.99°)
OKLab	oklab(30.93% 0.0003 -0.1584)
OKLCH	oklch(30.93% 0.158 270.1)
XYZ	xyz(4.5573, 2.5667, 19.9899)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D7E #7E7817

analogous

#17517E #171D7E #45177E

triadic

#171D7E #7E171D #1D7E17

tetradic

#171D7E #7E1751 #7E7817 #177E45

square

#171D7E #7E1751 #7E7817 #177E45

split-complementary

#171D7E #7E4517 #517E17

monochromatic

#05061A #0E114A #171D7E #2029B2 #353FDA

Accessibility & contrast

On white

13.88

#171D7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171D7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D7E

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D7E	#FFFFFF	#000000	##FFFFFF
##171D7E	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003281

Deuteranopia (green-blind)

#00277C

Tritanopia (blue-blind)

#00394C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171d7e;
/* rgb */ color: rgb(23, 29, 126);
/* oklch */ color: oklch(30.9% 0.158 270.1);

Tailwind

colors: {
  custom: {
    50: '#695aa4',
    500: '#171d7e',
    950: '#000000',
  },
}

SCSS

$custom: #171d7e;
$custom-light: #695aa4;
$custom-dark: #000000;

JSON

{
  "hex": "#171d7e",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 126
  },
  "hsl": {
    "h": 236.505,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.30932,
    "c": 0.15836,
    "h": 270.1
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#171D7E

secondary

#B3AC3E

accent

#E23CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171D7E

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

Preview Lab → · Contrast checker → · Palette generator →