#3733B9#3733B9
#3733B9 is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.5% C 0.202 H 274.9°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).
Color values
| HEX | #3733B9 |
|---|---|
| RGB | rgb(55, 51, 185) |
| HSL | hsl(242, 57%, 46%) |
| HSV | hsv(242, 72%, 73%) |
| CMYK | cmyk(70.3%, 72.4%, 0%, 27.5%) |
| CIE-LAB | lab(31.07, 44.50, -69.53) |
| CIE-LCH | lch(31.07, 82.56, 302.62°) |
| OKLab | oklab(42.47% 0.0171 -0.201) |
| OKLCH | oklch(42.47% 0.202 274.9) |
| XYZ | xyz(11.5134, 6.6816, 46.5724) |
| Luminance | 0.0668 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 3.74
Blue With A Hint Of Purple
#533CC6
ΔE00 4.50
Ocean Blue
#4F42B5
ΔE00 4.66
Blurple
#5539CC
ΔE00 4.90
Blue Blue
#2242C7
ΔE00 4.95
Indigo Blue
#3A18B1
ΔE00 5.50
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3733B9 #B5B933
analogous
#3372B9 #3733B9 #7A33B9
triadic
#3733B9 #B93733 #33B937
tetradic
#3733B9 #B93372 #B5B933 #33B97A
square
#3733B9 #B93372 #B5B933 #33B97A
split-complementary
#3733B9 #B97A33 #72B933
monochromatic
#1A1959 #292689 #3733B9 #5C58D1 #8B88DE
Accessibility & contrast
On white
8.99
#3733B9 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.34
#3733B9 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3733B9
8.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3733B9 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3733B9 | 1.00 | 8.99 | 2.34 | 8.99 |
| #FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.34 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FBD
Deuteranopia (green-blind)
#0043B7
Tritanopia (blue-blind)
#005973
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #3733b9; /* rgb */ color: rgb(55, 51, 185); /* oklch */ color: oklch(42.5% 0.202 274.9);
Tailwind
colors: {
custom: {
50: '#816ccf',
500: '#3733b9',
950: '#000000',
},
}SCSS
$custom: #3733b9; $custom-light: #816ccf; $custom-dark: #000000;
JSON
{
"hex": "#3733b9",
"rgb": {
"r": 55,
"g": 51,
"b": 185
},
"hsl": {
"h": 241.791,
"s": 56.78,
"l": 46.275
},
"oklch": {
"l": 0.42471,
"c": 0.20176,
"h": 274.9
},
"luminance": 0.06683
}Semantic roles & 50–950 ramp
primary
#3733B9
secondary
#C6C880
accent
#E048DC
background
#F8F6FC
surface
#F0EBF9
border
#CBC6D2
text
#0C0714
muted
#7D7A82