#517BE9#517BE9
#517BE9 is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.9% C 0.172 H 265.8°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).
Color values
| HEX | #517BE9 |
|---|---|
| RGB | rgb(81, 123, 233) |
| HSL | hsl(223, 78%, 62%) |
| HSV | hsv(223, 65%, 91%) |
| CMYK | cmyk(65.2%, 47.2%, 0%, 8.6%) |
| CIE-LAB | lab(53.81, 20.22, -60.07) |
| CIE-LCH | lch(53.81, 63.39, 288.60°) |
| OKLab | oklab(60.89% -0.0127 -0.172) |
| OKLCH | oklch(60.89% 0.172 265.8) |
| XYZ | xyz(25.1792, 21.7961, 79.9551) |
| Luminance | 0.2180 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Lightish Blue
#3D7AFD
ΔE00 2.37
Clear Blue
#247AFD
ΔE00 3.52
Dodger Blue
#3E82FC
ΔE00 3.74
Deep Sky Blue
#0D75F8
ΔE00 4.32
Soft Blue
#6488EA
ΔE00 4.40
Cornflower Blue
#5170D7
ΔE00 4.47
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#517BE9 #E9BF51
analogous
#51C7E9 #517BE9 #7351E9
triadic
#517BE9 #E9517B #7BE951
tetradic
#517BE9 #E951C7 #E9BF51 #51E973
square
#517BE9 #E951C7 #E9BF51 #51E973
split-complementary
#517BE9 #E97351 #C7E951
monochromatic
#163FAA #1C53E0 #517BE9 #87A4F0 #BECDF7
Accessibility & contrast
On white
3.92
#517BE9 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.36
#517BE9 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #517BE9
5.36:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##517BE9 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##517BE9 | 1.00 | 3.92 | 5.36 | 5.36 |
| #FFFFFF | 3.92 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.36 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.36 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#4288ED
Deuteranopia (green-blind)
#217AE7
Tritanopia (blue-blind)
#0094A7
Achromatopsia (no color)
#818181
Design tokens & code
CSS
--color: #517be9; /* rgb */ color: rgb(81, 123, 233); /* oklch */ color: oklch(60.9% 0.172 265.8);
Tailwind
colors: {
custom: {
50: '#91a0f1',
500: '#517be9',
950: '#000000',
},
}SCSS
$custom: #517be9; $custom-light: #91a0f1; $custom-dark: #000000;
JSON
{
"hex": "#517be9",
"rgb": {
"r": 81,
"g": 123,
"b": 233
},
"hsl": {
"h": 223.421,
"s": 77.551,
"l": 61.569
},
"oklch": {
"l": 0.60893,
"c": 0.17249,
"h": 265.8
},
"luminance": 0.21798
}Semantic roles & 50–950 ramp
primary
#517BE9
secondary
#E7D8AF
accent
#A10CDA
background
#F9F9FE
surface
#F2F2FD
border
#CCCCD5
text
#0E0E17
muted
#7E7E85