#505BB5#505BB5
#505BB5 is a mid, vivid blue. Relative luminance 0.125; OKLCH L 50.9% C 0.141 H 275.0°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #505BB5 |
|---|---|
| RGB | rgb(80, 91, 181) |
| HSL | hsl(233, 41%, 51%) |
| HSV | hsv(233, 56%, 71%) |
| CMYK | cmyk(55.8%, 49.7%, 0%, 29%) |
| CIE-LAB | lab(42.04, 22.35, -49.26) |
| CIE-LCH | lch(42.04, 54.09, 294.41°) |
| OKLab | oklab(50.89% 0.0123 -0.1406) |
| OKLCH | oklch(50.89% 0.141 275) |
| XYZ | xyz(15.3872, 12.5228, 45.3134) |
| Luminance | 0.1252 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Iris
#6258C4
ΔE00 4.49
Warm Blue
#4B57DB
ΔE00 5.45
Dark Periwinkle
#665FD1
ΔE00 5.77
Dusky Blue
#475F94
ΔE00 5.78
Slate Blue
#6A5ACD
ΔE00 6.17
Denim Blue
#3B5B92
ΔE00 6.72
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#505BB5 #B5AA50
analogous
#508DB5 #505BB5 #7750B5
triadic
#505BB5 #B5505B #5BB550
tetradic
#505BB5 #B5508D #B5AA50 #50B577
square
#505BB5 #B5508D #B5AA50 #50B577
split-complementary
#505BB5 #B57750 #8DB550
monochromatic
#292F61 #3B448C #505BB5 #7B83C7 #A6ACD9
Accessibility & contrast
On white
5.99
#505BB5 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.50
#505BB5 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #505BB5
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##505BB5 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##505BB5 | 1.00 | 5.99 | 3.50 | 5.99 |
| #FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.50 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2E68B8
Deuteranopia (green-blind)
#205FB3
Tritanopia (blue-blind)
#1A6F7F
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #505bb5; /* rgb */ color: rgb(80, 91, 181); /* oklch */ color: oklch(50.9% 0.141 275.0);
Tailwind
colors: {
custom: {
50: '#8989cc',
500: '#505bb5',
950: '#000000',
},
}SCSS
$custom: #505bb5; $custom-light: #8989cc; $custom-dark: #000000;
JSON
{
"hex": "#505bb5",
"rgb": {
"r": 80,
"g": 91,
"b": 181
},
"hsl": {
"h": 233.465,
"s": 40.562,
"l": 51.176
},
"oklch": {
"l": 0.50888,
"c": 0.14116,
"h": 275
},
"luminance": 0.12524
}Semantic roles & 50–950 ramp
primary
#505BB5
secondary
#C7C29A
accent
#C357D0
background
#F8F8FC
surface
#F0F0F9
border
#CBCBD2
text
#0C0B13
muted
#7D7C82