#3737B0#3737B0
#3737B0 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.2% C 0.186 H 274.9°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).
Color values
| HEX | #3737B0 |
|---|---|
| RGB | rgb(55, 55, 176) |
| HSL | hsl(240, 52%, 45%) |
| HSV | hsv(240, 69%, 69%) |
| CMYK | cmyk(68.8%, 68.8%, 0%, 31%) |
| CIE-LAB | lab(31.06, 39.14, -64.20) |
| CIE-LCH | lch(31.06, 75.19, 301.37°) |
| OKLab | oklab(42.2% 0.016 -0.1854) |
| OKLCH | oklch(42.2% 0.186 274.9) |
| XYZ | xyz(10.7756, 6.6782, 41.7870) |
| Luminance | 0.0668 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.61
Ocean Blue
#4F42B5
ΔE00 4.15
Blue Blue
#2242C7
ΔE00 4.66
Blue With A Hint Of Purple
#533CC6
ΔE00 5.03
Blueberry
#464196
ΔE00 5.43
Blurple
#5539CC
ΔE00 5.69
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3737B0 #B0B037
analogous
#3773B0 #3737B0 #7337B0
triadic
#3737B0 #B03737 #37B037
tetradic
#3737B0 #B03773 #B0B037 #37B073
square
#3737B0 #B03773 #B0B037 #37B073
split-complementary
#3737B0 #B07337 #73B037
monochromatic
#1A1A53 #282881 #3737B0 #5959CB #8888DA
Accessibility & contrast
On white
8.99
#3737B0 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.34
#3737B0 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3737B0
8.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3737B0 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3737B0 | 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)
#004FB4
Deuteranopia (green-blind)
#0044AE
Tritanopia (blue-blind)
#00586F
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #3737b0; /* rgb */ color: rgb(55, 55, 176); /* oklch */ color: oklch(42.2% 0.186 274.9);
Tailwind
colors: {
custom: {
50: '#7e6fc9',
500: '#3737b0',
950: '#000000',
},
}SCSS
$custom: #3737b0; $custom-light: #7e6fc9; $custom-dark: #000000;
JSON
{
"hex": "#3737b0",
"rgb": {
"r": 55,
"g": 55,
"b": 176
},
"hsl": {
"h": 240,
"s": 52.381,
"l": 45.294
},
"oklch": {
"l": 0.42204,
"c": 0.18614,
"h": 274.9
},
"luminance": 0.06679
}Semantic roles & 50–950 ramp
primary
#3737B0
secondary
#C4C47F
accent
#DC4CDC
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0B0713
muted
#7C7A82