#517BE4#517BE4

#517BE4 is a mid, vivid blue. Relative luminance 0.215; OKLCH L 60.6% C 0.166 H 265.4°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#517BE4
RGB	rgb(81, 123, 228)
HSL	hsl(223, 73%, 61%)
HSV	hsv(223, 64%, 89%)
CMYK	cmyk(64.5%, 46.1%, 0%, 10.6%)
CIE-LAB	lab(53.51, 18.50, -57.76)
CIE-LCH	lch(53.51, 60.65, 287.76°)
OKLab	oklab(60.57% -0.0134 -0.1652)
OKLCH	oklch(60.57% 0.166 265.4)
XYZ	xyz(24.4750, 21.5144, 76.2466)
Luminance	0.2152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BE4 #E4BA51

analogous

#51C4E4 #517BE4 #7051E4

triadic

#517BE4 #E4517B #7BE451

tetradic

#517BE4 #E451C4 #E4BA51 #51E470

square

#517BE4 #E451C4 #E4BA51 #51E470

split-complementary

#517BE4 #E47051 #C4E451

monochromatic

#1940A2 #2155D7 #517BE4 #86A3EC #BBCBF4

Accessibility & contrast

On white

3.96

#517BE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#517BE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BE4

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BE4	#FFFFFF	#000000	##000000
##517BE4	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4687E8

Deuteranopia (green-blind)

#2B7AE2

Tritanopia (blue-blind)

#0093A4

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #517be4;
/* rgb */ color: rgb(81, 123, 228);
/* oklch */ color: oklch(60.6% 0.166 265.4);

Tailwind

colors: {
  custom: {
    50: '#90a0ed',
    500: '#517be4',
    950: '#000000',
  },
}

SCSS

$custom: #517be4;
$custom-light: #90a0ed;
$custom-dark: #000000;

JSON

{
  "hex": "#517be4",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 228
  },
  "hsl": {
    "h": 222.857,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.60565,
    "c": 0.16576,
    "h": 265.4
  },
  "luminance": 0.21517
}

Semantic roles & 50–950 ramp

primary

#517BE4

secondary

#E4D4AC

accent

#9D10D5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #517BE4

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

Preview Lab → · Contrast checker → · Palette generator →