#373BB4#373BB4
#373BB4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.2% C 0.187 H 273.9°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).
Color values
| HEX | #373BB4 |
|---|---|
| RGB | rgb(55, 59, 180) |
| HSL | hsl(238, 53%, 46%) |
| HSV | hsv(238, 69%, 71%) |
| CMYK | cmyk(69.4%, 67.2%, 0%, 29.4%) |
| CIE-LAB | lab(32.33, 38.06, -64.49) |
| CIE-LCH | lch(32.33, 74.89, 300.55°) |
| OKLab | oklab(43.24% 0.0128 -0.1863) |
| OKLCH | oklch(43.24% 0.187 273.9) |
| XYZ | xyz(11.3750, 7.2344, 43.9681) |
| Luminance | 0.0723 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.70
Ocean Blue
#4F42B5
ΔE00 3.55
Blue Blue
#2242C7
ΔE00 3.59
Blue With A Hint Of Purple
#533CC6
ΔE00 4.64
Blueberry
#464196
ΔE00 5.39
Blurple
#5539CC
ΔE00 5.39
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#373BB4 #B4B037
analogous
#3779B4 #373BB4 #7137B4
triadic
#373BB4 #B4373B #3BB437
tetradic
#373BB4 #B43779 #B4B037 #37B471
square
#373BB4 #B43779 #B4B037 #37B471
split-complementary
#373BB4 #B47137 #79B437
monochromatic
#1A1C56 #292C85 #373BB4 #5B5FCD #8A8DDB
Accessibility & contrast
On white
8.58
#373BB4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.45
#373BB4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #373BB4
8.58:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##373BB4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##373BB4 | 1.00 | 8.58 | 2.45 | 8.58 |
| #FFFFFF | 8.58 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.45 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.58 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0052B8
Deuteranopia (green-blind)
#0046B2
Tritanopia (blue-blind)
#005B72
Achromatopsia (no color)
#4C4C4C
Design tokens & code
CSS
--color: #373bb4; /* rgb */ color: rgb(55, 59, 180); /* oklch */ color: oklch(43.2% 0.187 273.9);
Tailwind
colors: {
custom: {
50: '#7f71cc',
500: '#373bb4',
950: '#000000',
},
}SCSS
$custom: #373bb4; $custom-light: #7f71cc; $custom-dark: #000000;
JSON
{
"hex": "#373bb4",
"rgb": {
"r": 55,
"g": 59,
"b": 180
},
"hsl": {
"h": 238.08,
"s": 53.191,
"l": 46.078
},
"oklch": {
"l": 0.43236,
"c": 0.18674,
"h": 273.9
},
"luminance": 0.07235
}Semantic roles & 50–950 ramp
primary
#373BB4
secondary
#C6C381
accent
#D84BDD
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0B0813
muted
#7C7B82