#5171BF#5171BF

#5171BF is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.2% C 0.127 H 265.7°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#5171BF
RGB	rgb(81, 113, 191)
HSL	hsl(223, 46%, 53%)
HSV	hsv(223, 58%, 75%)
CMYK	cmyk(57.6%, 40.8%, 0%, 25.1%)
CIE-LAB	lab(48.66, 12.09, -44.48)
CIE-LCH	lch(48.66, 46.10, 285.21°)
OKLab	oklab(56.15% -0.0095 -0.1264)
OKLCH	oklch(56.15% 0.127 265.7)
XYZ	xyz(18.6992, 17.3197, 51.6378)
Luminance	0.1732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5171BF #BF9F51

analogous

#51A8BF #5171BF #6851BF

triadic

#5171BF #BF5171 #71BF51

tetradic

#5171BF #BF51A8 #BF9F51 #51BF68

square

#5171BF #BF51A8 #BF9F51 #51BF68

split-complementary

#5171BF #BF6851 #A8BF51

monochromatic

#283C6D #39559A #5171BF #7E96CF #AABAE0

Accessibility & contrast

On white

4.70

#5171BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#5171BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5171BF

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5171BF	#FFFFFF	#000000	##FFFFFF
##5171BF	1.00	4.70	4.46	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5079C2

Deuteranopia (green-blind)

#416FBD

Tritanopia (blue-blind)

#00828F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #5171bf;
/* rgb */ color: rgb(81, 113, 191);
/* oklch */ color: oklch(56.2% 0.127 265.7);

Tailwind

colors: {
  custom: {
    50: '#8a99d3',
    500: '#5171bf',
    950: '#000000',
  },
}

SCSS

$custom: #5171bf;
$custom-light: #8a99d3;
$custom-dark: #000000;

JSON

{
  "hex": "#5171bf",
  "rgb": {
    "r": 81,
    "g": 113,
    "b": 191
  },
  "hsl": {
    "h": 222.545,
    "s": 46.218,
    "l": 53.333
  },
  "oklch": {
    "l": 0.56154,
    "c": 0.12672,
    "h": 265.7
  },
  "luminance": 0.17321
}

Semantic roles & 50–950 ramp

primary

#5171BF

secondary

#CEC09E

accent

#AF52D6

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #5171BF

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

Preview Lab → · Contrast checker → · Palette generator →