#3837CB#3837CB
#3837CB is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 44.9% C 0.219 H 273.4°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).
Color values
| HEX | #3837CB |
|---|---|
| RGB | rgb(56, 55, 203) |
| HSL | hsl(240, 59%, 51%) |
| HSV | hsv(240, 73%, 80%) |
| CMYK | cmyk(72.4%, 72.9%, 0%, 20.4%) |
| CIE-LAB | lab(33.74, 48.23, -75.70) |
| CIE-LCH | lch(33.74, 89.76, 302.50°) |
| OKLab | oklab(44.93% 0.0131 -0.219) |
| OKLCH | oklch(44.93% 0.219 273.4) |
| XYZ | xyz(13.7730, 7.8835, 57.2842) |
| Luminance | 0.0789 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue With A Hint Of Purple
#533CC6
ΔE00 3.28
Blurple
#5539CC
ΔE00 3.43
Blue Blue
#2242C7
ΔE00 3.89
Ocean Blue
#4F42B5
ΔE00 4.52
Blue (survey)
#0343DF
ΔE00 4.67
Vibrant Blue
#0339F8
ΔE00 5.25
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3837CB #CACB37
analogous
#3780CB #3837CB #8237CB
triadic
#3837CB #CB3837 #37CB38
tetradic
#3837CB #CB3780 #CACB37 #37CB82
square
#3837CB #CB3780 #CACB37 #37CB82
split-complementary
#3837CB #CB8237 #80CB37
monochromatic
#1D1C6C #29299C #3837CB #6868D8 #9998E4
Accessibility & contrast
On white
8.15
#3837CB on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.58
#3837CB on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3837CB
8.15:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3837CB | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3837CB | 1.00 | 8.15 | 2.58 | 8.15 |
| #FFFFFF | 8.15 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.58 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.15 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0056CF
Deuteranopia (green-blind)
#0048C8
Tritanopia (blue-blind)
#00617E
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #3837cb; /* rgb */ color: rgb(56, 55, 203); /* oklch */ color: oklch(44.9% 0.219 273.4);
Tailwind
colors: {
custom: {
50: '#8570dc',
500: '#3837cb',
950: '#000000',
},
}SCSS
$custom: #3837cb; $custom-light: #8570dc; $custom-dark: #000000;
JSON
{
"hex": "#3837cb",
"rgb": {
"r": 56,
"g": 55,
"b": 203
},
"hsl": {
"h": 240.405,
"s": 58.73,
"l": 50.588
},
"oklch": {
"l": 0.44926,
"c": 0.21938,
"h": 273.4
},
"luminance": 0.07885
}Semantic roles & 50–950 ramp
primary
#3837CB
secondary
#CFD08E
accent
#E246E1
background
#F9F6FD
surface
#F1ECFB
border
#CBC7D4
text
#0D0715
muted
#7E7A83