#3663E3#3663E3
#3663E3 is a mid, highly saturated blue. Relative luminance 0.153; OKLCH L 54.5% C 0.201 H 265.4°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).
Color values
| HEX | #3663E3 |
|---|---|
| RGB | rgb(54, 99, 227) |
| HSL | hsl(224, 76%, 55%) |
| HSV | hsv(224, 76%, 89%) |
| CMYK | cmyk(76.2%, 56.4%, 0%, 11%) |
| CIE-LAB | lab(45.98, 29.47, -69.42) |
| CIE-LCH | lch(45.98, 75.42, 293.00°) |
| OKLab | oklab(54.51% -0.0161 -0.2004) |
| OKLCH | oklch(54.51% 0.201 265.4) |
| XYZ | xyz(19.8434, 15.2518, 74.5562) |
| Luminance | 0.1525 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal Blue
#4169E1
ΔE00 2.06
Azul
#1D5DEC
ΔE00 2.19
Bright Blue
#0165FC
ΔE00 3.00
Cornflower Blue
#5170D7
ΔE00 4.78
Cerulean Blue
#056EEE
ΔE00 5.01
Warm Blue
#4B57DB
ΔE00 5.02
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3663E3 #E3B636
analogous
#36BAE3 #3663E3 #5F36E3
triadic
#3663E3 #E33663 #63E336
tetradic
#3663E3 #E336BA #E3B636 #36E35F
square
#3663E3 #E336BA #E3B636 #36E35F
split-complementary
#3663E3 #E35F36 #BAE336
monochromatic
#13338B #1B46C1 #3663E3 #6C8DEA #A1B6F2
Accessibility & contrast
On white
5.18
#3663E3 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.05
#3663E3 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #3663E3
5.18:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3663E3 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3663E3 | 1.00 | 5.18 | 4.05 | 5.18 |
| #FFFFFF | 5.18 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.05 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.18 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0075E7
Deuteranopia (green-blind)
#0065E1
Tritanopia (blue-blind)
#008399
Achromatopsia (no color)
#6D6D6D
Design tokens & code
CSS
--color: #3663e3; /* rgb */ color: rgb(54, 99, 227); /* oklch */ color: oklch(54.5% 0.201 265.4);
Tailwind
colors: {
custom: {
50: '#868eed',
500: '#3663e3',
950: '#000000',
},
}SCSS
$custom: #3663e3; $custom-light: #868eed; $custom-dark: #000000;
JSON
{
"hex": "#3663e3",
"rgb": {
"r": 54,
"g": 99,
"b": 227
},
"hsl": {
"h": 224.393,
"s": 75.546,
"l": 55.098
},
"oklch": {
"l": 0.54511,
"c": 0.20103,
"h": 265.4
},
"luminance": 0.15254
}Semantic roles & 50–950 ramp
primary
#3663E3
secondary
#DFCC96
accent
#C136F2
background
#F9F8FE
surface
#F1F0FD
border
#CBCBD5
text
#0D0C16
muted
#7E7D84