#3F5BCC#3F5BCC
#3F5BCC is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.6% C 0.178 H 268.8°. Best body text is #FFFFFF at 5.87:1 contrast (WCAG AA passes).
Color values
| HEX | #3F5BCC |
|---|---|
| RGB | rgb(63, 91, 204) |
| HSL | hsl(228, 58%, 52%) |
| HSV | hsv(228, 69%, 80%) |
| CMYK | cmyk(69.1%, 55.4%, 0%, 20%) |
| CIE-LAB | lab(42.61, 27.35, -61.75) |
| CIE-LCH | lch(42.61, 67.54, 293.89°) |
| OKLab | oklab(51.55% -0.0037 -0.1778) |
| OKLCH | oklch(51.55% 0.178 268.8) |
| XYZ | xyz(16.6863, 12.8969, 58.7250) |
| Luminance | 0.1290 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Warm Blue
#4B57DB
ΔE00 3.36
Azul
#1D5DEC
ΔE00 4.04
Royal Blue
#4169E1
ΔE00 5.42
Sapphire
#0F52BA
ΔE00 5.50
Iris
#6258C4
ΔE00 5.99
Denim
#1560BD
ΔE00 6.16
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F5BCC #CCB03F
analogous
#3FA2CC #3F5BCC #693FCC
triadic
#3F5BCC #CC3F5B #5BCC3F
tetradic
#3F5BCC #CC3FA2 #CCB03F #3FCC69
square
#3F5BCC #CC3FA2 #CCB03F #3FCC69
split-complementary
#3F5BCC #CC693F #A2CC3F
monochromatic
#1E2F72 #2B43A3 #3F5BCC #6F84D9 #A0AEE6
Accessibility & contrast
On white
5.87
#3F5BCC on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.58
#3F5BCC on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #3F5BCC
5.87:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F5BCC | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3F5BCC | 1.00 | 5.87 | 3.58 | 5.87 |
| #FFFFFF | 5.87 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.58 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.87 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#006BD0
Deuteranopia (green-blind)
#005ECA
Tritanopia (blue-blind)
#00768A
Achromatopsia (no color)
#656565
Design tokens & code
CSS
--color: #3f5bcc; /* rgb */ color: rgb(63, 91, 204); /* oklch */ color: oklch(51.6% 0.178 268.8);
Tailwind
colors: {
custom: {
50: '#8589dc',
500: '#3f5bcc',
950: '#000000',
},
}SCSS
$custom: #3f5bcc; $custom-light: #8589dc; $custom-dark: #000000;
JSON
{
"hex": "#3f5bcc",
"rgb": {
"r": 63,
"g": 91,
"b": 204
},
"hsl": {
"h": 228.085,
"s": 58.025,
"l": 52.353
},
"oklch": {
"l": 0.51554,
"c": 0.17781,
"h": 268.8
},
"luminance": 0.12899
}Semantic roles & 50–950 ramp
primary
#3F5BCC
secondary
#D2C695
accent
#C347E1
background
#F8F8FD
surface
#F0EFFB
border
#CBCAD4
text
#0C0B15
muted
#7D7C83