#3748B4#3748B4
#3748B4 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.5% C 0.171 H 271.1°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).
Color values
| HEX | #3748B4 |
|---|---|
| RGB | rgb(55, 72, 180) |
| HSL | hsl(232, 53%, 46%) |
| HSV | hsv(232, 69%, 71%) |
| CMYK | cmyk(69.4%, 60%, 0%, 29.4%) |
| CIE-LAB | lab(35.48, 29.82, -59.35) |
| CIE-LCH | lch(35.48, 66.42, 296.68°) |
| OKLab | oklab(45.55% 0.0032 -0.1711) |
| OKLCH | oklch(45.55% 0.171 271.1) |
| XYZ | xyz(12.1283, 8.7411, 44.2192) |
| Luminance | 0.0874 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 3.17
Ocean Blue
#4F42B5
ΔE00 4.45
Cobalt
#0047AB
ΔE00 4.70
Sapphire (survey)
#2138AB
ΔE00 4.90
Sapphire
#0F52BA
ΔE00 5.49
Blue (survey)
#0343DF
ΔE00 5.52
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3748B4 #B4A337
analogous
#3786B4 #3748B4 #6437B4
triadic
#3748B4 #B43748 #48B437
tetradic
#3748B4 #B43786 #B4A337 #37B464
square
#3748B4 #B43786 #B4A337 #37B464
split-complementary
#3748B4 #B46437 #86B437
monochromatic
#1A2256 #293585 #3748B4 #5B6BCD #8A95DB
Accessibility & contrast
On white
7.64
#3748B4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.75
#3748B4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3748B4
7.64:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3748B4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3748B4 | 1.00 | 7.64 | 2.75 | 7.64 |
| #FFFFFF | 7.64 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.75 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.64 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0059B8
Deuteranopia (green-blind)
#004EB2
Tritanopia (blue-blind)
#006377
Achromatopsia (no color)
#535353
Design tokens & code
CSS
--color: #3748b4; /* rgb */ color: rgb(55, 72, 180); /* oklch */ color: oklch(45.5% 0.171 271.1);
Tailwind
colors: {
custom: {
50: '#7e7acb',
500: '#3748b4',
950: '#000000',
},
}SCSS
$custom: #3748b4; $custom-light: #7e7acb; $custom-dark: #000000;
JSON
{
"hex": "#3748b4",
"rgb": {
"r": 55,
"g": 72,
"b": 180
},
"hsl": {
"h": 231.84,
"s": 53.191,
"l": 46.078
},
"oklch": {
"l": 0.45546,
"c": 0.17116,
"h": 271.1
},
"luminance": 0.08742
}Semantic roles & 50–950 ramp
primary
#3748B4
secondary
#C6BC81
accent
#C94BDD
background
#F8F7FC
surface
#EFEDF9
border
#CAC8D2
text
#0B0913
muted
#7C7B82