#3F71D1#3F71D1
#3F71D1 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.4% C 0.158 H 262.0°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).
Color values
| HEX | #3F71D1 |
|---|---|
| RGB | rgb(63, 113, 209) |
| HSL | hsl(219, 61%, 53%) |
| HSV | hsv(219, 70%, 82%) |
| CMYK | cmyk(69.9%, 45.9%, 0%, 18%) |
| CIE-LAB | lab(48.84, 15.19, -54.55) |
| CIE-LCH | lch(48.84, 56.63, 285.56°) |
| OKLab | oklab(56.4% -0.0221 -0.1562) |
| OKLCH | oklch(56.4% 0.158 262) |
| XYZ | xyz(19.4596, 17.4684, 62.6554) |
| Luminance | 0.1747 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 3.17
Cerulean Blue
#056EEE
ΔE00 3.32
Royal Blue
#4169E1
ΔE00 3.86
Medium Blue
#2C6FBB
ΔE00 4.33
Deep Sky Blue
#0D75F8
ΔE00 4.48
Windows Blue
#3778BF
ΔE00 4.50
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F71D1 #D19F3F
analogous
#3FBAD1 #3F71D1 #563FD1
triadic
#3F71D1 #D13F71 #71D13F
tetradic
#3F71D1 #D13FBA #D19F3F #3FD156
square
#3F71D1 #D13FBA #D19F3F #3FD156
split-complementary
#3F71D1 #D1563F #BAD13F
monochromatic
#1D3C79 #2955AA #3F71D1 #7096DD #A2BAE9
Accessibility & contrast
On white
4.67
#3F71D1 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.49
#3F71D1 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #3F71D1
4.67:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F71D1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3F71D1 | 1.00 | 4.67 | 4.49 | 4.67 |
| #FFFFFF | 4.67 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.49 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 4.67 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#407BD5
Deuteranopia (green-blind)
#216ECF
Tritanopia (blue-blind)
#008797
Achromatopsia (no color)
#747474
Design tokens & code
CSS
--color: #3f71d1; /* rgb */ color: rgb(63, 113, 209); /* oklch */ color: oklch(56.4% 0.158 262.0);
Tailwind
colors: {
custom: {
50: '#8599e0',
500: '#3f71d1',
950: '#000000',
},
}SCSS
$custom: #3f71d1; $custom-light: #8599e0; $custom-dark: #000000;
JSON
{
"hex": "#3f71d1",
"rgb": {
"r": 63,
"g": 113,
"b": 209
},
"hsl": {
"h": 219.452,
"s": 61.345,
"l": 53.333
},
"oklch": {
"l": 0.56401,
"c": 0.1578,
"h": 262
},
"luminance": 0.1747
}Semantic roles & 50–950 ramp
primary
#3F71D1
secondary
#D5C097
accent
#AD43E4
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0D15
muted
#7D7E83