#3748B5#3748B5
#3748B5 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.6% C 0.173 H 271.1°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).
Color values
| HEX | #3748B5 |
|---|---|
| RGB | rgb(55, 72, 181) |
| HSL | hsl(232, 53%, 46%) |
| HSV | hsv(232, 70%, 71%) |
| CMYK | cmyk(69.6%, 60.2%, 0%, 29%) |
| CIE-LAB | lab(35.56, 30.18, -59.81) |
| CIE-LCH | lch(35.56, 66.99, 296.78°) |
| OKLab | oklab(45.63% 0.0032 -0.1725) |
| OKLCH | oklch(45.63% 0.173 271.1) |
| XYZ | xyz(12.2306, 8.7820, 44.7576) |
| Luminance | 0.0878 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 3.06
Ocean Blue
#4F42B5
ΔE00 4.41
Cobalt
#0047AB
ΔE00 4.77
Sapphire (survey)
#2138AB
ΔE00 4.93
Blue (survey)
#0343DF
ΔE00 5.39
Sapphire
#0F52BA
ΔE00 5.50
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3748B5 #B5A437
analogous
#3787B5 #3748B5 #6537B5
triadic
#3748B5 #B53748 #48B537
tetradic
#3748B5 #B53787 #B5A437 #37B565
square
#3748B5 #B53787 #B5A437 #37B565
split-complementary
#3748B5 #B56537 #87B537
monochromatic
#1A2357 #293586 #3748B5 #5C6BCD #8B96DC
Accessibility & contrast
On white
7.62
#3748B5 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.76
#3748B5 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3748B5
7.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3748B5 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3748B5 | 1.00 | 7.62 | 2.76 | 7.62 |
| #FFFFFF | 7.62 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.76 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.62 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#005AB9
Deuteranopia (green-blind)
#004EB3
Tritanopia (blue-blind)
#006377
Achromatopsia (no color)
#545454
Design tokens & code
CSS
--color: #3748b5; /* rgb */ color: rgb(55, 72, 181); /* oklch */ color: oklch(45.6% 0.173 271.1);
Tailwind
colors: {
custom: {
50: '#7e7acc',
500: '#3748b5',
950: '#000000',
},
}SCSS
$custom: #3748b5; $custom-light: #7e7acc; $custom-dark: #000000;
JSON
{
"hex": "#3748b5",
"rgb": {
"r": 55,
"g": 72,
"b": 181
},
"hsl": {
"h": 231.905,
"s": 53.39,
"l": 46.275
},
"oklch": {
"l": 0.4563,
"c": 0.17251,
"h": 271.1
},
"luminance": 0.08783
}Semantic roles & 50–950 ramp
primary
#3748B5
secondary
#C6BD82
accent
#C94BDD
background
#F8F7FC
surface
#EFEDF9
border
#CAC8D2
text
#0B0913
muted
#7C7B82