#517BF3#517BF3

#517BF3 is a mid, vivid blue. Relative luminance 0.224; OKLCH L 61.6% C 0.186 H 266.5°. Best body text is #000000 at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#517BF3
RGB	rgb(81, 123, 243)
HSL	hsl(224, 87%, 64%)
HSV	hsv(224, 67%, 95%)
CMYK	cmyk(66.7%, 49.4%, 0%, 4.7%)
CIE-LAB	lab(54.43, 23.67, -64.65)
CIE-LCH	lch(54.43, 68.84, 290.11°)
OKLab	oklab(61.57% -0.0115 -0.1855)
OKLCH	oklch(61.57% 0.186 266.5)
XYZ	xyz(26.6483, 22.3837, 87.6928)
Luminance	0.2239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BF3 #F3C951

analogous

#51CCF3 #517BF3 #7851F3

triadic

#517BF3 #F3517B #7BF351

tetradic

#517BF3 #F351CC #F3C951 #51F378

square

#517BF3 #F351CC #F3C951 #51F378

split-complementary

#517BF3 #F37851 #CCF351

monochromatic

#0D3BBD #1850EF #517BF3 #8AA6F7 #C4D2FB

Accessibility & contrast

On white

3.83

#517BF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.48

#517BF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BF3

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BF3	#FFFFFF	#000000	##000000
##517BF3	1.00	3.83	5.48	5.48
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.48	21.00	1.00	1.00
##000000	5.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#368AF7

Deuteranopia (green-blind)

#007BF1

Tritanopia (blue-blind)

#0097AB

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #517bf3;
/* rgb */ color: rgb(81, 123, 243);
/* oklch */ color: oklch(61.6% 0.186 266.5);

Tailwind

colors: {
  custom: {
    50: '#92a0f8',
    500: '#517bf3',
    950: '#000000',
  },
}

SCSS

$custom: #517bf3;
$custom-light: #92a0f8;
$custom-dark: #000000;

JSON

{
  "hex": "#517bf3",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 243
  },
  "hsl": {
    "h": 224.444,
    "s": 87.097,
    "l": 63.529
  },
  "oklch": {
    "l": 0.61566,
    "c": 0.18582,
    "h": 266.5
  },
  "luminance": 0.22386
}

Semantic roles & 50–950 ramp

primary

#517BF3

secondary

#EDDEB3

accent

#A902E4

background

#F9F9FF

surface

#F2F2FF

border

#CCCCD7

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #517BF3

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

Preview Lab → · Contrast checker → · Palette generator →