#5171CC#5171CC

#5171CC is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.0% C 0.145 H 267.2°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#5171CC
RGB	rgb(81, 113, 204)
HSL	hsl(224, 55%, 56%)
HSV	hsv(224, 60%, 80%)
CMYK	cmyk(60.3%, 44.6%, 0%, 20%)
CIE-LAB	lab(49.40, 16.47, -50.77)
CIE-LCH	lch(49.40, 53.37, 287.98°)
OKLab	oklab(56.96% -0.0072 -0.1448)
OKLCH	oklch(56.96% 0.145 267.2)
XYZ	xyz(20.1938, 17.9175, 59.5093)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5171CC #CCAC51

analogous

#51AFCC #5171CC #6E51CC

triadic

#5171CC #CC5171 #71CC51

tetradic

#5171CC #CC51AF #CCAC51 #51CC6E

square

#5171CC #CC51AF #CCAC51 #51CC6E

split-complementary

#5171CC #CC6E51 #AFCC51

monochromatic

#253C7E #3353AD #5171CC #8098DA #B0BEE8

Accessibility & contrast

On white

4.58

#5171CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#5171CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5171CC

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5171CC	#FFFFFF	#000000	##000000
##5171CC	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#477BCF

Deuteranopia (green-blind)

#3470CA

Tritanopia (blue-blind)

#008594

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #5171cc;
/* rgb */ color: rgb(81, 113, 204);
/* oklch */ color: oklch(57.0% 0.145 267.2);

Tailwind

colors: {
  custom: {
    50: '#8c99dc',
    500: '#5171cc',
    950: '#000000',
  },
}

SCSS

$custom: #5171cc;
$custom-light: #8c99dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5171cc",
  "rgb": {
    "r": 81,
    "g": 113,
    "b": 204
  },
  "hsl": {
    "h": 224.39,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.56958,
    "c": 0.14498,
    "h": 267.2
  },
  "luminance": 0.17919
}

Semantic roles & 50–950 ramp

primary

#5171CC

secondary

#D6C9A3

accent

#B74ADE

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0D15

muted

#7E7E83

Preview Lab

Preview with #5171CC

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

Preview Lab → · Contrast checker → · Palette generator →