#3F41B5#3F41B5
#3F41B5 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.9% C 0.179 H 275.7°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).
Color values
| HEX | #3F41B5 |
|---|---|
| RGB | rgb(63, 65, 181) |
| HSL | hsl(239, 48%, 48%) |
| HSV | hsv(239, 65%, 71%) |
| CMYK | cmyk(65.2%, 64.1%, 0%, 29%) |
| CIE-LAB | lab(34.34, 35.77, -61.78) |
| CIE-LCH | lch(34.34, 71.39, 300.07°) |
| OKLab | oklab(44.86% 0.0177 -0.1781) |
| OKLCH | oklch(44.86% 0.179 275.7) |
| XYZ | xyz(12.2780, 8.1725, 44.6375) |
| Luminance | 0.0817 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Ocean Blue
#4F42B5
ΔE00 2.37
Blue Blue
#2242C7
ΔE00 3.34
Sapphire (survey)
#2138AB
ΔE00 4.02
Blue With A Hint Of Purple
#533CC6
ΔE00 4.19
Blueberry
#464196
ΔE00 4.94
Blurple
#5539CC
ΔE00 5.13
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F41B5 #B5B33F
analogous
#3F7CB5 #3F41B5 #783FB5
triadic
#3F41B5 #B53F41 #41B53F
tetradic
#3F41B5 #B53F7C #B5B33F #3FB578
square
#3F41B5 #B53F7C #B5B33F #3FB578
split-complementary
#3F41B5 #B5783F #7CB53F
monochromatic
#1F205A #2F3188 #3F41B5 #6769CA #9496DA
Accessibility & contrast
On white
7.97
#3F41B5 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.63
#3F41B5 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3F41B5
7.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F41B5 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3F41B5 | 1.00 | 7.97 | 2.63 | 7.97 |
| #FFFFFF | 7.97 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.97 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0056B9
Deuteranopia (green-blind)
#004CB3
Tritanopia (blue-blind)
#005F75
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #3f41b5; /* rgb */ color: rgb(63, 65, 181); /* oklch */ color: oklch(44.9% 0.179 275.7);
Tailwind
colors: {
custom: {
50: '#8276cc',
500: '#3f41b5',
950: '#000000',
},
}SCSS
$custom: #3f41b5; $custom-light: #8276cc; $custom-dark: #000000;
JSON
{
"hex": "#3f41b5",
"rgb": {
"r": 63,
"g": 65,
"b": 181
},
"hsl": {
"h": 238.983,
"s": 48.361,
"l": 47.843
},
"oklch": {
"l": 0.44861,
"c": 0.179,
"h": 275.7
},
"luminance": 0.08174
}Semantic roles & 50–950 ramp
primary
#3F41B5
secondary
#C5C48A
accent
#D650D8
background
#F8F7FC
surface
#F0EDF9
border
#CBC8D2
text
#0C0813
muted
#7D7B82