#3737B5#3737B5
#3737B5 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.193 H 274.6°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).
Color values
| HEX | #3737B5 |
|---|---|
| RGB | rgb(55, 55, 181) |
| HSL | hsl(240, 53%, 46%) |
| HSV | hsv(240, 70%, 71%) |
| CMYK | cmyk(69.6%, 69.6%, 0%, 29%) |
| CIE-LAB | lab(31.53, 40.83, -66.40) |
| CIE-LCH | lch(31.53, 77.95, 301.59°) |
| OKLab | oklab(42.68% 0.0153 -0.1919) |
| OKLCH | oklch(42.68% 0.193 274.6) |
| XYZ | xyz(11.2795, 6.8797, 44.4406) |
| Luminance | 0.0688 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.95
Ocean Blue
#4F42B5
ΔE00 4.02
Blue Blue
#2242C7
ΔE00 4.30
Blue With A Hint Of Purple
#533CC6
ΔE00 4.56
Blurple
#5539CC
ΔE00 5.17
Blueberry
#464196
ΔE00 5.94
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3737B5 #B5B537
analogous
#3776B5 #3737B5 #7637B5
triadic
#3737B5 #B53737 #37B537
tetradic
#3737B5 #B53776 #B5B537 #37B576
square
#3737B5 #B53776 #B5B537 #37B576
split-complementary
#3737B5 #B57637 #76B537
monochromatic
#1A1A57 #292986 #3737B5 #5C5CCD #8B8BDC
Accessibility & contrast
On white
8.84
#3737B5 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.38
#3737B5 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3737B5
8.84:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3737B5 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3737B5 | 1.00 | 8.84 | 2.38 | 8.84 |
| #FFFFFF | 8.84 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.38 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.84 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0050B9
Deuteranopia (green-blind)
#0044B3
Tritanopia (blue-blind)
#005972
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #3737b5; /* rgb */ color: rgb(55, 55, 181); /* oklch */ color: oklch(42.7% 0.193 274.6);
Tailwind
colors: {
custom: {
50: '#7f6fcc',
500: '#3737b5',
950: '#000000',
},
}SCSS
$custom: #3737b5; $custom-light: #7f6fcc; $custom-dark: #000000;
JSON
{
"hex": "#3737b5",
"rgb": {
"r": 55,
"g": 55,
"b": 181
},
"hsl": {
"h": 240,
"s": 53.39,
"l": 46.275
},
"oklch": {
"l": 0.42684,
"c": 0.19251,
"h": 274.6
},
"luminance": 0.06881
}Semantic roles & 50–950 ramp
primary
#3737B5
secondary
#C6C682
accent
#DD4BDD
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0714
muted
#7D7A82