#3F37B2#3F37B2
#3F37B2 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.9% C 0.187 H 277.9°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).
Color values
| HEX | #3F37B2 |
|---|---|
| RGB | rgb(63, 55, 178) |
| HSL | hsl(244, 53%, 46%) |
| HSV | hsv(244, 69%, 70%) |
| CMYK | cmyk(64.6%, 69.1%, 0%, 30.2%) |
| CIE-LAB | lab(31.81, 40.85, -64.14) |
| CIE-LCH | lch(31.81, 76.04, 302.49°) |
| OKLab | oklab(42.95% 0.0258 -0.1851) |
| OKLCH | oklch(42.95% 0.187 277.9) |
| XYZ | xyz(11.4494, 7.0026, 42.8591) |
| Luminance | 0.0700 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Ocean Blue
#4F42B5
ΔE00 3.47
Sapphire (survey)
#2138AB
ΔE00 3.68
Blue With A Hint Of Purple
#533CC6
ΔE00 4.12
Blurple
#5539CC
ΔE00 4.78
Blue Blue
#2242C7
ΔE00 5.01
Blueberry
#464196
ΔE00 5.48
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F37B2 #AAB237
analogous
#376DB2 #3F37B2 #7C37B2
triadic
#3F37B2 #B23F37 #37B23F
tetradic
#3F37B2 #B2376D #AAB237 #37B27C
square
#3F37B2 #B2376D #AAB237 #37B27C
split-complementary
#3F37B2 #B27C37 #6DB237
monochromatic
#1E1A54 #2E2983 #3F37B2 #625ACC #8E89DB
Accessibility & contrast
On white
8.75
#3F37B2 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.40
#3F37B2 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3F37B2
8.75:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F37B2 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3F37B2 | 1.00 | 8.75 | 2.40 | 8.75 |
| #FFFFFF | 8.75 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.40 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.75 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0050B6
Deuteranopia (green-blind)
#0046B0
Tritanopia (blue-blind)
#005870
Achromatopsia (no color)
#4B4B4B
Design tokens & code
CSS
--color: #3f37b2; /* rgb */ color: rgb(63, 55, 178); /* oklch */ color: oklch(42.9% 0.187 277.9);
Tailwind
colors: {
custom: {
50: '#826fca',
500: '#3f37b2',
950: '#000000',
},
}SCSS
$custom: #3f37b2; $custom-light: #826fca; $custom-dark: #000000;
JSON
{
"hex": "#3f37b2",
"rgb": {
"r": 63,
"g": 55,
"b": 178
},
"hsl": {
"h": 243.902,
"s": 52.79,
"l": 45.686
},
"oklch": {
"l": 0.42947,
"c": 0.18685,
"h": 277.9
},
"luminance": 0.07003
}Semantic roles & 50–950 ramp
primary
#3F37B2
secondary
#C0C580
accent
#DC4CD3
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0713
muted
#7D7A82