#171B7C#171B7C

#171B7C is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.158 H 270.5°. Best body text is #FFFFFF at 14.15:1 contrast (WCAG AA passes).

Color values

HEX	#171B7C
RGB	rgb(23, 27, 124)
HSL	hsl(238, 69%, 29%)
HSV	hsv(238, 81%, 49%)
CMYK	cmyk(81.5%, 78.2%, 0%, 51.4%)
CIE-LAB	lab(17.56, 34.65, -54.49)
CIE-LCH	lch(17.56, 64.58, 302.45°)
OKLab	oklab(30.4% 0.0014 -0.1578)
OKLCH	oklch(30.4% 0.158 270.5)
XYZ	xyz(4.3821, 2.4208, 19.3012)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7C #7C7817

analogous

#174E7C #171B7C #46177C

triadic

#171B7C #7C171B #1B7C17

tetradic

#171B7C #7C174E #7C7817 #177C46

square

#171B7C #7C174E #7C7817 #177C46

split-complementary

#171B7C #7C4617 #4E7C17

monochromatic

#05061A #0D1048 #171B7C #2126B0 #343BD9

Accessibility & contrast

On white

14.15

#171B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7C

14.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7C	#FFFFFF	#000000	##FFFFFF
##171B7C	1.00	14.15	1.48	14.15
#FFFFFF	14.15	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307F

Deuteranopia (green-blind)

#00267A

Tritanopia (blue-blind)

#00384A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171b7c;
/* rgb */ color: rgb(23, 27, 124);
/* oklch */ color: oklch(30.4% 0.158 270.5);

Tailwind

colors: {
  custom: {
    50: '#6859a3',
    500: '#171b7c',
    950: '#000000',
  },
}

SCSS

$custom: #171b7c;
$custom-light: #6859a3;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7c",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 124
  },
  "hsl": {
    "h": 237.624,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30395,
    "c": 0.15783,
    "h": 270.5
  },
  "luminance": 0.02421
}

Semantic roles & 50–950 ramp

primary

#171B7C

secondary

#B1AC3E

accent

#E53CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B7C

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

Preview Lab → · Contrast checker → · Palette generator →