#3F37AF#3F37AF
#3F37AF is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.183 H 278.2°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).
Color values
| HEX | #3F37AF |
|---|---|
| RGB | rgb(63, 55, 175) |
| HSL | hsl(244, 52%, 45%) |
| HSV | hsv(244, 69%, 69%) |
| CMYK | cmyk(64%, 68.6%, 0%, 31.4%) |
| CIE-LAB | lab(31.54, 39.86, -62.80) |
| CIE-LCH | lch(31.54, 74.38, 302.41°) |
| OKLab | oklab(42.67% 0.0262 -0.1811) |
| OKLCH | oklch(42.67% 0.183 278.2) |
| XYZ | xyz(11.1515, 6.8834, 41.2901) |
| Luminance | 0.0688 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Ocean Blue
#4F42B5
ΔE00 3.56
Sapphire (survey)
#2138AB
ΔE00 3.56
Blue With A Hint Of Purple
#533CC6
ΔE00 4.44
Blurple
#5539CC
ΔE00 5.12
Blueberry
#464196
ΔE00 5.16
Blue Blue
#2242C7
ΔE00 5.24
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F37AF #A7AF37
analogous
#376BAF #3F37AF #7B37AF
triadic
#3F37AF #AF3F37 #37AF3F
tetradic
#3F37AF #AF376B #A7AF37 #37AF7B
square
#3F37AF #AF376B #A7AF37 #37AF7B
split-complementary
#3F37AF #AF7B37 #6BAF37
monochromatic
#1D1A52 #2E2880 #3F37AF #6059CB #8D87D9
Accessibility & contrast
On white
8.84
#3F37AF on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.38
#3F37AF on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3F37AF
8.84:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F37AF | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3F37AF | 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)
#004FB3
Deuteranopia (green-blind)
#0045AD
Tritanopia (blue-blind)
#00576E
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #3f37af; /* rgb */ color: rgb(63, 55, 175); /* oklch */ color: oklch(42.7% 0.183 278.2);
Tailwind
colors: {
custom: {
50: '#826fc8',
500: '#3f37af',
950: '#000000',
},
}SCSS
$custom: #3f37af; $custom-light: #826fc8; $custom-dark: #000000;
JSON
{
"hex": "#3f37af",
"rgb": {
"r": 63,
"g": 55,
"b": 175
},
"hsl": {
"h": 244,
"s": 52.174,
"l": 45.098
},
"oklch": {
"l": 0.42667,
"c": 0.18302,
"h": 278.2
},
"luminance": 0.06884
}Semantic roles & 50–950 ramp
primary
#3F37AF
secondary
#BFC37F
accent
#DC4CD2
background
#F8F6FC
surface
#F0ECF8
border
#CBC7D1
text
#0C0713
muted
#7D7A82