#517BF9#517BF9

#517BF9 is a mid, vivid blue. Relative luminance 0.228; OKLCH L 62.0% C 0.194 H 266.8°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#517BF9
RGB	rgb(81, 123, 249)
HSL	hsl(225, 93%, 65%)
HSV	hsv(225, 67%, 98%)
CMYK	cmyk(67.5%, 50.6%, 0%, 2.4%)
CIE-LAB	lab(54.82, 25.74, -67.35)
CIE-LCH	lch(54.82, 72.10, 290.91°)
OKLab	oklab(61.98% -0.0108 -0.1934)
OKLCH	oklch(61.98% 0.194 266.8)
XYZ	xyz(27.5693, 22.7521, 92.5428)
Luminance	0.2276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BF9 #F9CF51

analogous

#51CFF9 #517BF9 #7B51F9

triadic

#517BF9 #F9517B #7BF951

tetradic

#517BF9 #F951CF #F9CF51 #51F97B

square

#517BF9 #F951CF #F9CF51 #51F97B

split-complementary

#517BF9 #F97B51 #CFF951

monochromatic

#0737C9 #164EF7 #517BF9 #8CA8FB #C7D5FD

Accessibility & contrast

On white

3.78

#517BF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#517BF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BF9

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BF9	#FFFFFF	#000000	##000000
##517BF9	1.00	3.78	5.55	5.55
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E8BFE

Deuteranopia (green-blind)

#007CF6

Tritanopia (blue-blind)

#0099AE

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #517bf9;
/* rgb */ color: rgb(81, 123, 249);
/* oklch */ color: oklch(62.0% 0.194 266.8);

Tailwind

colors: {
  custom: {
    50: '#93a0fc',
    500: '#517bf9',
    950: '#000000',
  },
}

SCSS

$custom: #517bf9;
$custom-light: #93a0fc;
$custom-dark: #000000;

JSON

{
  "hex": "#517bf9",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 249
  },
  "hsl": {
    "h": 225,
    "s": 93.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.61981,
    "c": 0.19373,
    "h": 266.8
  },
  "luminance": 0.22755
}

Semantic roles & 50–950 ramp

primary

#517BF9

secondary

#F0E1B6

accent

#AC00E6

background

#F9F9FF

surface

#F2F2FF

border

#CCCCD7

text

#0F0E18

muted

#7E7E86

Preview Lab

Preview with #517BF9

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

Preview Lab → · Contrast checker → · Palette generator →