#3731BD#3731BD
#3731BD is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.6% C 0.209 H 274.8°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).
Color values
| HEX | #3731BD |
|---|---|
| RGB | rgb(55, 49, 189) |
| HSL | hsl(243, 59%, 47%) |
| HSV | hsv(243, 74%, 74%) |
| CMYK | cmyk(70.9%, 74.1%, 0%, 25.9%) |
| CIE-LAB | lab(31.07, 46.93, -71.90) |
| CIE-LCH | lch(31.07, 85.86, 303.14°) |
| OKLab | oklab(42.59% 0.0175 -0.2079) |
| OKLCH | oklch(42.59% 0.209 274.8) |
| XYZ | xyz(11.8561, 6.6818, 48.7991) |
| Luminance | 0.0668 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 4.32
Blue With A Hint Of Purple
#533CC6
ΔE00 4.45
Blurple
#5539CC
ΔE00 4.69
Ocean Blue
#4F42B5
ΔE00 5.03
Indigo Blue
#3A18B1
ΔE00 5.16
Blue Blue
#2242C7
ΔE00 5.23
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3731BD #B7BD31
analogous
#3171BD #3731BD #7D31BD
triadic
#3731BD #BD3731 #31BD37
tetradic
#3731BD #BD3171 #B7BD31 #31BD7D
square
#3731BD #BD3171 #B7BD31 #31BD7D
split-complementary
#3731BD #BD7D31 #71BD31
monochromatic
#1B185C #29248C #3731BD #5D58D4 #8C88E0
Accessibility & contrast
On white
8.99
#3731BD on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.34
#3731BD on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3731BD
8.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3731BD | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3731BD | 1.00 | 8.99 | 2.34 | 8.99 |
| #FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.34 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FC1
Deuteranopia (green-blind)
#0043BA
Tritanopia (blue-blind)
#005974
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #3731bd; /* rgb */ color: rgb(55, 49, 189); /* oklch */ color: oklch(42.6% 0.209 274.8);
Tailwind
colors: {
custom: {
50: '#826bd2',
500: '#3731bd',
950: '#000000',
},
}SCSS
$custom: #3731bd; $custom-light: #826bd2; $custom-dark: #000000;
JSON
{
"hex": "#3731bd",
"rgb": {
"r": 55,
"g": 49,
"b": 189
},
"hsl": {
"h": 242.571,
"s": 58.824,
"l": 46.667
},
"oklch": {
"l": 0.42592,
"c": 0.20863,
"h": 274.8
},
"luminance": 0.06683
}Semantic roles & 50–950 ramp
primary
#3731BD
secondary
#C7CA80
accent
#E246DB
background
#F8F6FD
surface
#F0EBFA
border
#CBC6D3
text
#0C0714
muted
#7D7A83