#3741BA#3741BA
#3741BA is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.8% C 0.188 H 272.5°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).
Color values
| HEX | #3741BA |
|---|---|
| RGB | rgb(55, 65, 186) |
| HSL | hsl(235, 54%, 47%) |
| HSV | hsv(235, 70%, 73%) |
| CMYK | cmyk(70.4%, 65.1%, 0%, 27.1%) |
| CIE-LAB | lab(34.27, 36.42, -64.88) |
| CIE-LCH | lch(34.27, 74.40, 299.31°) |
| OKLab | oklab(44.81% 0.0082 -0.1874) |
| OKLCH | oklch(44.81% 0.188 272.5) |
| XYZ | xyz(12.3258, 8.1368, 47.3658) |
| Luminance | 0.0814 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 2.23
Ocean Blue
#4F42B5
ΔE00 3.33
Sapphire (survey)
#2138AB
ΔE00 3.73
Blue With A Hint Of Purple
#533CC6
ΔE00 4.62
Blue (survey)
#0343DF
ΔE00 4.76
Blurple
#5539CC
ΔE00 5.45
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3741BA #BAB037
analogous
#3782BA #3741BA #6F37BA
triadic
#3741BA #BA3741 #41BA37
tetradic
#3741BA #BA3782 #BAB037 #37BA6F
square
#3741BA #BA3782 #BAB037 #37BA6F
split-complementary
#3741BA #BA6F37 #82BA37
monochromatic
#1B205C #29308B #3741BA #5F67D0 #8E94DE
Accessibility & contrast
On white
7.99
#3741BA on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.63
#3741BA on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3741BA
7.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3741BA | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3741BA | 1.00 | 7.99 | 2.63 | 7.99 |
| #FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0057BE
Deuteranopia (green-blind)
#004BB8
Tritanopia (blue-blind)
#006177
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #3741ba; /* rgb */ color: rgb(55, 65, 186); /* oklch */ color: oklch(44.8% 0.188 272.5);
Tailwind
colors: {
custom: {
50: '#8076d0',
500: '#3741ba',
950: '#000000',
},
}SCSS
$custom: #3741ba; $custom-light: #8076d0; $custom-dark: #000000;
JSON
{
"hex": "#3741ba",
"rgb": {
"r": 55,
"g": 65,
"b": 186
},
"hsl": {
"h": 235.42,
"s": 54.357,
"l": 47.255
},
"oklch": {
"l": 0.44807,
"c": 0.18758,
"h": 272.5
},
"luminance": 0.08138
}Semantic roles & 50–950 ramp
primary
#3741BA
secondary
#C8C385
accent
#D24ADE
background
#F8F7FC
surface
#F0EDF9
border
#CBC8D2
text
#0C0814
muted
#7D7B82