#5170BF#5170BF

#5170BF is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.9% C 0.128 H 266.2°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#5170BF
RGB	rgb(81, 112, 191)
HSL	hsl(223, 46%, 53%)
HSV	hsv(223, 58%, 75%)
CMYK	cmyk(57.6%, 41.4%, 0%, 25.1%)
CIE-LAB	lab(48.38, 12.71, -44.92)
CIE-LCH	lch(48.38, 46.69, 285.80°)
OKLab	oklab(55.94% -0.0084 -0.1277)
OKLCH	oklch(55.94% 0.128 266.2)
XYZ	xyz(18.5883, 17.0978, 51.6008)
Luminance	0.1710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5170BF #BFA051

analogous

#51A7BF #5170BF #6951BF

triadic

#5170BF #BF5170 #70BF51

tetradic

#5170BF #BF51A7 #BFA051 #51BF69

square

#5170BF #BF51A7 #BFA051 #51BF69

split-complementary

#5170BF #BF6951 #A7BF51

monochromatic

#283C6D #39549A #5170BF #7E95CF #AABAE0

Accessibility & contrast

On white

4.75

#5170BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#5170BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5170BF

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5170BF	#FFFFFF	#000000	##FFFFFF
##5170BF	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E78C2

Deuteranopia (green-blind)

#406EBD

Tritanopia (blue-blind)

#00818E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5170bf;
/* rgb */ color: rgb(81, 112, 191);
/* oklch */ color: oklch(55.9% 0.128 266.2);

Tailwind

colors: {
  custom: {
    50: '#8a98d3',
    500: '#5170bf',
    950: '#000000',
  },
}

SCSS

$custom: #5170bf;
$custom-light: #8a98d3;
$custom-dark: #000000;

JSON

{
  "hex": "#5170bf",
  "rgb": {
    "r": 81,
    "g": 112,
    "b": 191
  },
  "hsl": {
    "h": 223.091,
    "s": 46.218,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5594,
    "c": 0.12794,
    "h": 266.2
  },
  "luminance": 0.17099
}

Semantic roles & 50–950 ramp

primary

#5170BF

secondary

#CEC09E

accent

#B152D6

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #5170BF

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

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