#517FE5#517FE5

#517FE5 is a mid, vivid blue. Relative luminance 0.226; OKLCH L 61.5% C 0.162 H 264.0°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#517FE5
RGB	rgb(81, 127, 229)
HSL	hsl(221, 74%, 61%)
HSV	hsv(221, 65%, 90%)
CMYK	cmyk(64.6%, 44.5%, 0%, 10.2%)
CIE-LAB	lab(54.64, 16.39, -56.51)
CIE-LCH	lch(54.64, 58.84, 286.18°)
OKLab	oklab(61.45% -0.017 -0.1615)
OKLCH	oklch(61.45% 0.162 264)
XYZ	xyz(25.1206, 22.5828, 77.1486)
Luminance	0.2258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FE5 #E5B751

analogous

#51C9E5 #517FE5 #6D51E5

triadic

#517FE5 #E5517F #7FE551

tetradic

#517FE5 #E551C9 #E5B751 #51E56D

square

#517FE5 #E551C9 #E5B751 #51E56D

split-complementary

#517FE5 #E56D51 #C9E551

monochromatic

#1844A3 #205AD8 #517FE5 #86A6ED #BBCDF5

Accessibility & contrast

On white

3.81

#517FE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#517FE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FE5

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FE5	#FFFFFF	#000000	##000000
##517FE5	1.00	3.81	5.52	5.52
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E8AE9

Deuteranopia (green-blind)

#347CE3

Tritanopia (blue-blind)

#0096A7

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #517fe5;
/* rgb */ color: rgb(81, 127, 229);
/* oklch */ color: oklch(61.5% 0.162 264.0);

Tailwind

colors: {
  custom: {
    50: '#90a3ee',
    500: '#517fe5',
    950: '#000000',
  },
}

SCSS

$custom: #517fe5;
$custom-light: #90a3ee;
$custom-dark: #000000;

JSON

{
  "hex": "#517fe5",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 229
  },
  "hsl": {
    "h": 221.351,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.61452,
    "c": 0.16238,
    "h": 264
  },
  "luminance": 0.22585
}

Semantic roles & 50–950 ramp

primary

#517FE5

secondary

#E5D4AD

accent

#980FD6

background

#F9FAFE

surface

#F2F3FD

border

#CCCDD5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #517FE5

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

Preview Lab → · Contrast checker → · Palette generator →