#3640B4#3640B4
#3640B4 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.181 H 272.6°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).
Color values
| HEX | #3640B4 |
|---|---|
| RGB | rgb(54, 64, 180) |
| HSL | hsl(235, 54%, 46%) |
| HSV | hsv(235, 70%, 71%) |
| CMYK | cmyk(70%, 64.4%, 0%, 29.4%) |
| CIE-LAB | lab(33.45, 34.81, -62.67) |
| CIE-LCH | lch(33.45, 71.69, 299.05°) |
| OKLab | oklab(44.03% 0.0082 -0.181) |
| OKLCH | oklch(44.03% 0.181 272.6) |
| XYZ | xyz(11.5902, 7.7452, 44.0553) |
| Luminance | 0.0775 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 2.82
Sapphire (survey)
#2138AB
ΔE00 3.06
Ocean Blue
#4F42B5
ΔE00 3.51
Blue With A Hint Of Purple
#533CC6
ΔE00 5.12
Blueberry
#464196
ΔE00 5.17
Blue (survey)
#0343DF
ΔE00 5.52
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3640B4 #B4AA36
analogous
#367FB4 #3640B4 #6B36B4
triadic
#3640B4 #B43640 #40B436
tetradic
#3640B4 #B4367F #B4AA36 #36B46B
square
#3640B4 #B4367F #B4AA36 #36B46B
split-complementary
#3640B4 #B46B36 #7FB436
monochromatic
#1A1F56 #282F85 #3640B4 #5A63CD #898FDC
Accessibility & contrast
On white
8.24
#3640B4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.55
#3640B4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3640B4
8.24:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3640B4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3640B4 | 1.00 | 8.24 | 2.55 | 8.24 |
| #FFFFFF | 8.24 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.55 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.24 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0055B8
Deuteranopia (green-blind)
#0049B2
Tritanopia (blue-blind)
#005E74
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #3640b4; /* rgb */ color: rgb(54, 64, 180); /* oklch */ color: oklch(44.0% 0.181 272.6);
Tailwind
colors: {
custom: {
50: '#7e75cb',
500: '#3640b4',
950: '#000000',
},
}SCSS
$custom: #3640b4; $custom-light: #7e75cb; $custom-dark: #000000;
JSON
{
"hex": "#3640b4",
"rgb": {
"r": 54,
"g": 64,
"b": 180
},
"hsl": {
"h": 235.238,
"s": 53.846,
"l": 45.882
},
"oklch": {
"l": 0.44031,
"c": 0.18116,
"h": 272.6
},
"luminance": 0.07746
}Semantic roles & 50–950 ramp
primary
#3640B4
secondary
#C6C080
accent
#D24BDD
background
#F8F7FC
surface
#EFEDF9
border
#CAC8D2
text
#0B0813
muted
#7C7B82