#171B7F#171B7F

#171B7F is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.7% C 0.162 H 270.3°. Best body text is #FFFFFF at 14.00:1 contrast (WCAG AA passes).

Color values

HEX	#171B7F
RGB	rgb(23, 27, 127)
HSL	hsl(238, 69%, 29%)
HSV	hsv(238, 82%, 50%)
CMYK	cmyk(81.9%, 78.7%, 0%, 50.2%)
CIE-LAB	lab(17.91, 35.72, -55.82)
CIE-LCH	lch(17.91, 66.27, 302.61°)
OKLab	oklab(30.75% 0.0009 -0.1617)
OKLCH	oklch(30.75% 0.162 270.3)
XYZ	xyz(4.5747, 2.4978, 20.3156)
Luminance	0.0250 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7F #7F7B17

analogous

#174F7F #171B7F #47177F

triadic

#171B7F #7F171B #1B7F17

tetradic

#171B7F #7F174F #7F7B17 #177F47

square

#171B7F #7F174F #7F7B17 #177F47

split-complementary

#171B7F #7F4717 #4F7F17

monochromatic

#05061A #0E104B #171B7F #2026B3 #363CDB

Accessibility & contrast

On white

14.00

#171B7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#171B7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7F

14.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7F	#FFFFFF	#000000	##FFFFFF
##171B7F	1.00	14.00	1.50	14.00
#FFFFFF	14.00	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003182

Deuteranopia (green-blind)

#00277D

Tritanopia (blue-blind)

#00394C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171b7f;
/* rgb */ color: rgb(23, 27, 127);
/* oklch */ color: oklch(30.7% 0.162 270.3);

Tailwind

colors: {
  custom: {
    50: '#6959a5',
    500: '#171b7f',
    950: '#000000',
  },
}

SCSS

$custom: #171b7f;
$custom-light: #6959a5;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7f",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 127
  },
  "hsl": {
    "h": 237.692,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30747,
    "c": 0.16167,
    "h": 270.3
  },
  "luminance": 0.02498
}

Semantic roles & 50–950 ramp

primary

#171B7F

secondary

#B4AF3E

accent

#E53CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #171B7F

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

Preview Lab → · Contrast checker → · Palette generator →