#3739BC#3739BC
#3739BC is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.199 H 273.8°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).
Color values
| HEX | #3739BC |
|---|---|
| RGB | rgb(55, 57, 188) |
| HSL | hsl(239, 55%, 48%) |
| HSV | hsv(239, 71%, 74%) |
| CMYK | cmyk(70.7%, 69.7%, 0%, 26.3%) |
| CIE-LAB | lab(32.63, 42.00, -68.74) |
| CIE-LCH | lch(32.63, 80.56, 301.43°) |
| OKLab | oklab(43.68% 0.0132 -0.1987) |
| OKLCH | oklch(43.68% 0.199 273.8) |
| XYZ | xyz(12.1128, 7.3681, 48.3510) |
| Luminance | 0.0737 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 3.49
Blue Blue
#2242C7
ΔE00 3.50
Ocean Blue
#4F42B5
ΔE00 3.74
Blue With A Hint Of Purple
#533CC6
ΔE00 3.94
Blurple
#5539CC
ΔE00 4.53
Blue (survey)
#0343DF
ΔE00 5.46
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3739BC #BCBA37
analogous
#377BBC #3739BC #7837BC
triadic
#3739BC #BC3739 #39BC37
tetradic
#3739BC #BC377B #BCBA37 #37BC78
square
#3739BC #BC377B #BCBA37 #37BC78
split-complementary
#3739BC #BC7837 #7BBC37
monochromatic
#1B1C5D #292B8D #3739BC #6061D0 #8F90DE
Accessibility & contrast
On white
8.49
#3739BC on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.47
#3739BC on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3739BC
8.49:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3739BC | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3739BC | 1.00 | 8.49 | 2.47 | 8.49 |
| #FFFFFF | 8.49 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.47 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.49 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0053C0
Deuteranopia (green-blind)
#0046BA
Tritanopia (blue-blind)
#005D76
Achromatopsia (no color)
#4D4D4D
Design tokens & code
CSS
--color: #3739bc; /* rgb */ color: rgb(55, 57, 188); /* oklch */ color: oklch(43.7% 0.199 273.8);
Tailwind
colors: {
custom: {
50: '#8170d1',
500: '#3739bc',
950: '#000000',
},
}SCSS
$custom: #3739bc; $custom-light: #8170d1; $custom-dark: #000000;
JSON
{
"hex": "#3739bc",
"rgb": {
"r": 55,
"g": 57,
"b": 188
},
"hsl": {
"h": 239.098,
"s": 54.733,
"l": 47.647
},
"oklch": {
"l": 0.43676,
"c": 0.19915,
"h": 273.8
},
"luminance": 0.07369
}Semantic roles & 50–950 ramp
primary
#3739BC
secondary
#C9C886
accent
#DC4ADE
background
#F8F6FD
surface
#F0ECFA
border
#CBC7D3
text
#0C0714
muted
#7D7A83