#3F7BD7#3F7BD7
#3F7BD7 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 58.9% C 0.154 H 258.8°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).
Color values
| HEX | #3F7BD7 |
|---|---|
| RGB | rgb(63, 123, 215) |
| HSL | hsl(216, 66%, 55%) |
| HSV | hsv(216, 71%, 84%) |
| CMYK | cmyk(70.7%, 42.8%, 0%, 15.7%) |
| CIE-LAB | lab(51.98, 11.13, -52.93) |
| CIE-LCH | lch(51.98, 54.09, 281.88°) |
| OKLab | oklab(58.93% -0.03 -0.1513) |
| OKLCH | oklch(58.93% 0.154 258.8) |
| XYZ | xyz(21.3942, 20.1267, 67.0341) |
| Luminance | 0.2013 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Windows Blue
#3778BF
ΔE00 3.58
Deep Sky Blue
#0D75F8
ΔE00 3.59
Clear Blue
#247AFD
ΔE00 3.72
Azure
#007FFF
ΔE00 4.15
Lightish Blue
#3D7AFD
ΔE00 4.56
Dodger Blue
#3E82FC
ΔE00 4.74
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F7BD7 #D79B3F
analogous
#3FC7D7 #3F7BD7 #4F3FD7
triadic
#3F7BD7 #D73F7B #7BD73F
tetradic
#3F7BD7 #D73FC7 #D79B3F #3FD74F
square
#3F7BD7 #D73FC7 #D79B3F #3FD74F
split-complementary
#3F7BD7 #D74F3F #C7D73F
monochromatic
#1B4381 #255DB3 #3F7BD7 #729EE2 #A4C1EC
Accessibility & contrast
On white
4.18
#3F7BD7 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.03
#3F7BD7 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #3F7BD7
5.03:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F7BD7 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##3F7BD7 | 1.00 | 4.18 | 5.03 | 5.03 |
| #FFFFFF | 4.18 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.03 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.03 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#4E84DB
Deuteranopia (green-blind)
#3475D5
Tritanopia (blue-blind)
#00909E
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #3f7bd7; /* rgb */ color: rgb(63, 123, 215); /* oklch */ color: oklch(58.9% 0.154 258.8);
Tailwind
colors: {
custom: {
50: '#86a0e4',
500: '#3f7bd7',
950: '#000000',
},
}SCSS
$custom: #3f7bd7; $custom-light: #86a0e4; $custom-dark: #000000;
JSON
{
"hex": "#3f7bd7",
"rgb": {
"r": 63,
"g": 123,
"b": 215
},
"hsl": {
"h": 216.316,
"s": 65.517,
"l": 54.51
},
"oklch": {
"l": 0.58933,
"c": 0.15428,
"h": 258.8
},
"luminance": 0.20129
}Semantic roles & 50–950 ramp
primary
#3F7BD7
secondary
#D9C099
accent
#A63FE8
background
#F8F9FE
surface
#F0F2FC
border
#CBCCD5
text
#0C0E15
muted
#7D7E84