#517FE4#517FE4

#517FE4 is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.4% C 0.161 H 263.9°. Best body text is #000000 at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#517FE4
RGB	rgb(81, 127, 228)
HSL	hsl(221, 73%, 61%)
HSV	hsv(221, 64%, 89%)
CMYK	cmyk(64.5%, 44.3%, 0%, 10.6%)
CIE-LAB	lab(54.58, 16.05, -56.04)
CIE-LCH	lch(54.58, 58.29, 285.98°)
OKLab	oklab(61.39% -0.0172 -0.1601)
OKLCH	oklch(61.39% 0.161 263.9)
XYZ	xyz(24.9814, 22.5272, 76.4154)
Luminance	0.2253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FE4 #E4B651

analogous

#51C9E4 #517FE4 #6C51E4

triadic

#517FE4 #E4517F #7FE451

tetradic

#517FE4 #E451C9 #E4B651 #51E46C

square

#517FE4 #E451C9 #E4B651 #51E46C

split-complementary

#517FE4 #E46C51 #C9E451

monochromatic

#1944A2 #215AD7 #517FE4 #86A6EC #BBCDF4

Accessibility & contrast

On white

3.81

#517FE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.51

#517FE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FE4

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FE4	#FFFFFF	#000000	##000000
##517FE4	1.00	3.81	5.51	5.51
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.51	21.00	1.00	1.00
##000000	5.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E8AE8

Deuteranopia (green-blind)

#357CE2

Tritanopia (blue-blind)

#0096A6

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #517fe4;
/* rgb */ color: rgb(81, 127, 228);
/* oklch */ color: oklch(61.4% 0.161 263.9);

Tailwind

colors: {
  custom: {
    50: '#90a3ed',
    500: '#517fe4',
    950: '#000000',
  },
}

SCSS

$custom: #517fe4;
$custom-light: #90a3ed;
$custom-dark: #000000;

JSON

{
  "hex": "#517fe4",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 228
  },
  "hsl": {
    "h": 221.224,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.61388,
    "c": 0.16102,
    "h": 263.9
  },
  "luminance": 0.2253
}

Semantic roles & 50–950 ramp

primary

#517FE4

secondary

#E4D3AC

accent

#9810D5

background

#F9FAFE

surface

#F2F3FD

border

#CCCDD5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #517FE4

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

Preview Lab → · Contrast checker → · Palette generator →