#171D7B#171D7B

#171D7B is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.154 H 270.3°. Best body text is #FFFFFF at 14.02:1 contrast (WCAG AA passes).

Color values

HEX	#171D7B
RGB	rgb(23, 29, 123)
HSL	hsl(236, 68%, 29%)
HSV	hsv(236, 81%, 48%)
CMYK	cmyk(81.3%, 76.4%, 0%, 51.8%)
CIE-LAB	lab(17.88, 33.06, -53.33)
CIE-LCH	lch(17.88, 62.74, 301.80°)
OKLab	oklab(30.59% 0.0008 -0.1544)
OKLCH	oklch(30.59% 0.154 270.3)
XYZ	xyz(4.3666, 2.4905, 18.9856)
Luminance	0.0249 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D7B #7B7517

analogous

#174F7B #171D7B #43177B

triadic

#171D7B #7B171D #1D7B17

tetradic

#171D7B #7B174F #7B7517 #177B43

square

#171D7B #7B174F #7B7517 #177B43

split-complementary

#171D7B #7B4317 #4F7B17

monochromatic

#05061A #0D1147 #171D7B #2129AF #333DD9

Accessibility & contrast

On white

14.02

#171D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#171D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D7B

14.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D7B	#FFFFFF	#000000	##FFFFFF
##171D7B	1.00	14.02	1.50	14.02
#FFFFFF	14.02	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317E

Deuteranopia (green-blind)

#002779

Tritanopia (blue-blind)

#00384A

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171d7b;
/* rgb */ color: rgb(23, 29, 123);
/* oklch */ color: oklch(30.6% 0.154 270.3);

Tailwind

colors: {
  custom: {
    50: '#685aa2',
    500: '#171d7b',
    950: '#000000',
  },
}

SCSS

$custom: #171d7b;
$custom-light: #685aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#171d7b",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 123
  },
  "hsl": {
    "h": 236.4,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30587,
    "c": 0.15445,
    "h": 270.3
  },
  "luminance": 0.02491
}

Semantic roles & 50–950 ramp

primary

#171D7B

secondary

#B0A93E

accent

#E13CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171D7B

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

Preview Lab → · Contrast checker → · Palette generator →