#171B7E#171B7E

#171B7E is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.160 H 270.4°. Best body text is #FFFFFF at 14.05:1 contrast (WCAG AA passes).

Color values

HEX	#171B7E
RGB	rgb(23, 27, 126)
HSL	hsl(238, 69%, 29%)
HSV	hsv(238, 82%, 49%)
CMYK	cmyk(81.7%, 78.6%, 0%, 50.6%)
CIE-LAB	lab(17.79, 35.36, -55.38)
CIE-LCH	lch(17.79, 65.71, 302.56°)
OKLab	oklab(30.63% 0.001 -0.1604)
OKLCH	oklch(30.63% 0.16 270.4)
XYZ	xyz(4.5099, 2.4719, 19.9740)
Luminance	0.0247 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7E #7E7A17

analogous

#174F7E #171B7E #47177E

triadic

#171B7E #7E171B #1B7E17

tetradic

#171B7E #7E174F #7E7A17 #177E47

square

#171B7E #7E174F #7E7A17 #177E47

split-complementary

#171B7E #7E4717 #4F7E17

monochromatic

#05061A #0E104A #171B7E #2026B2 #353CDA

Accessibility & contrast

On white

14.05

#171B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#171B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7E

14.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7E	#FFFFFF	#000000	##FFFFFF
##171B7E	1.00	14.05	1.49	14.05
#FFFFFF	14.05	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003181

Deuteranopia (green-blind)

#00267C

Tritanopia (blue-blind)

#00394B

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171b7e;
/* rgb */ color: rgb(23, 27, 126);
/* oklch */ color: oklch(30.6% 0.160 270.4);

Tailwind

colors: {
  custom: {
    50: '#6959a5',
    500: '#171b7e',
    950: '#000000',
  },
}

SCSS

$custom: #171b7e;
$custom-light: #6959a5;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 126
  },
  "hsl": {
    "h": 237.67,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3063,
    "c": 0.16039,
    "h": 270.4
  },
  "luminance": 0.02472
}

Semantic roles & 50–950 ramp

primary

#171B7E

secondary

#B3AE3E

accent

#E53CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B7E

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

Preview Lab → · Contrast checker → · Palette generator →