#3739B0#3739B0
#3739B0 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.5% C 0.184 H 274.6°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).
Color values
| HEX | #3739B0 |
|---|---|
| RGB | rgb(55, 57, 176) |
| HSL | hsl(239, 52%, 45%) |
| HSV | hsv(239, 69%, 69%) |
| CMYK | cmyk(68.8%, 67.6%, 0%, 31%) |
| CIE-LAB | lab(31.51, 37.92, -63.46) |
| CIE-LCH | lch(31.51, 73.92, 300.86°) |
| OKLab | oklab(42.53% 0.0146 -0.1833) |
| OKLCH | oklch(42.53% 0.184 274.6) |
| XYZ | xyz(10.8726, 6.8721, 41.8193) |
| Luminance | 0.0687 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.45
Ocean Blue
#4F42B5
ΔE00 3.88
Blue Blue
#2242C7
ΔE00 4.28
Blue With A Hint Of Purple
#533CC6
ΔE00 5.00
Blueberry
#464196
ΔE00 5.17
Blurple
#5539CC
ΔE00 5.73
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3739B0 #B0AE37
analogous
#3776B0 #3739B0 #7137B0
triadic
#3739B0 #B03739 #39B037
tetradic
#3739B0 #B03776 #B0AE37 #37B071
square
#3739B0 #B03776 #B0AE37 #37B071
split-complementary
#3739B0 #B07137 #76B037
monochromatic
#1A1B53 #282A81 #3739B0 #595BCB #8889DA
Accessibility & contrast
On white
8.84
#3739B0 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.37
#3739B0 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3739B0
8.84:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3739B0 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3739B0 | 1.00 | 8.84 | 2.37 | 8.84 |
| #FFFFFF | 8.84 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.37 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.84 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0050B4
Deuteranopia (green-blind)
#0045AE
Tritanopia (blue-blind)
#00596F
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #3739b0; /* rgb */ color: rgb(55, 57, 176); /* oklch */ color: oklch(42.5% 0.184 274.6);
Tailwind
colors: {
custom: {
50: '#7e70c9',
500: '#3739b0',
950: '#000000',
},
}SCSS
$custom: #3739b0; $custom-light: #7e70c9; $custom-dark: #000000;
JSON
{
"hex": "#3739b0",
"rgb": {
"r": 55,
"g": 57,
"b": 176
},
"hsl": {
"h": 239.008,
"s": 52.381,
"l": 45.294
},
"oklch": {
"l": 0.4253,
"c": 0.18386,
"h": 274.6
},
"luminance": 0.06873
}Semantic roles & 50–950 ramp
primary
#3739B0
secondary
#C4C37F
accent
#D94CDC
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0B0713
muted
#7C7A82