#3739B5#3739B5
#3739B5 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.0% C 0.190 H 274.2°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).
Color values
| HEX | #3739B5 |
|---|---|
| RGB | rgb(55, 57, 181) |
| HSL | hsl(239, 53%, 46%) |
| HSV | hsv(239, 70%, 71%) |
| CMYK | cmyk(69.6%, 68.5%, 0%, 29%) |
| CIE-LAB | lab(31.97, 39.63, -65.68) |
| CIE-LCH | lch(31.97, 76.71, 301.10°) |
| OKLab | oklab(43% 0.0141 -0.1898) |
| OKLCH | oklch(43% 0.19 274.2) |
| XYZ | xyz(11.3764, 7.0736, 44.4729) |
| Luminance | 0.0707 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.82
Ocean Blue
#4F42B5
ΔE00 3.75
Blue Blue
#2242C7
ΔE00 3.89
Blue With A Hint Of Purple
#533CC6
ΔE00 4.52
Blurple
#5539CC
ΔE00 5.20
Blueberry
#464196
ΔE00 5.70
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3739B5 #B5B337
analogous
#3778B5 #3739B5 #7437B5
triadic
#3739B5 #B53739 #39B537
tetradic
#3739B5 #B53778 #B5B337 #37B574
square
#3739B5 #B53778 #B5B337 #37B574
split-complementary
#3739B5 #B57437 #78B537
monochromatic
#1A1B57 #292A86 #3739B5 #5C5ECD #8B8CDC
Accessibility & contrast
On white
8.70
#3739B5 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.41
#3739B5 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3739B5
8.70:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3739B5 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3739B5 | 1.00 | 8.70 | 2.41 | 8.70 |
| #FFFFFF | 8.70 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.41 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.70 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0051B9
Deuteranopia (green-blind)
#0045B3
Tritanopia (blue-blind)
#005A72
Achromatopsia (no color)
#4B4B4B
Design tokens & code
CSS
--color: #3739b5; /* rgb */ color: rgb(55, 57, 181); /* oklch */ color: oklch(43.0% 0.190 274.2);
Tailwind
colors: {
custom: {
50: '#7f70cc',
500: '#3739b5',
950: '#000000',
},
}SCSS
$custom: #3739b5; $custom-light: #7f70cc; $custom-dark: #000000;
JSON
{
"hex": "#3739b5",
"rgb": {
"r": 55,
"g": 57,
"b": 181
},
"hsl": {
"h": 239.048,
"s": 53.39,
"l": 46.275
},
"oklch": {
"l": 0.43003,
"c": 0.19029,
"h": 274.2
},
"luminance": 0.07075
}Semantic roles & 50–950 ramp
primary
#3739B5
secondary
#C6C582
accent
#DA4BDD
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0B0714
muted
#7C7A82