#3778B9#3778B9
#3778B9 is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.121 H 250.9°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).
Color values
| HEX | #3778B9 |
|---|---|
| RGB | rgb(55, 120, 185) |
| HSL | hsl(210, 54%, 47%) |
| HSV | hsv(210, 70%, 73%) |
| CMYK | cmyk(70.3%, 35.1%, 0%, 27.5%) |
| CIE-LAB | lab(49.19, 0.99, -40.26) |
| CIE-LCH | lch(49.19, 40.28, 271.41°) |
| OKLab | oklab(56.14% -0.0397 -0.1143) |
| OKLCH | oklch(56.14% 0.121 250.9) |
| XYZ | xyz(17.0457, 17.7461, 48.4165) |
| Luminance | 0.1775 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Windows Blue
#3778BF
ΔE00 0.84
Bluish
#2976BB
ΔE00 1.28
Flat Blue
#3C73A8
ΔE00 2.58
Medium Blue
#2C6FBB
ΔE00 3.33
Muted Blue
#3B719F
ΔE00 3.97
Steel Blue
#4682B4
ΔE00 4.04
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3778B9 #B97837
analogous
#37B9B9 #3778B9 #3737B9
triadic
#3778B9 #B93778 #78B937
tetradic
#3778B9 #B937B9 #B97837 #37B937
square
#3778B9 #B937B9 #B97837 #37B937
split-complementary
#3778B9 #B93737 #B9B937
monochromatic
#1B3B5B #29598A #3778B9 #5E97CF #8DB5DD
Accessibility & contrast
On white
4.62
#3778B9 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.55
#3778B9 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#FFFFFF on #3778B9
4.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3778B9 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3778B9 | 1.00 | 4.62 | 4.55 | 4.62 |
| #FFFFFF | 4.62 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.55 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 4.62 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5B7CBC
Deuteranopia (green-blind)
#486FB8
Tritanopia (blue-blind)
#008790
Achromatopsia (no color)
#757575
Design tokens & code
CSS
--color: #3778b9; /* rgb */ color: rgb(55, 120, 185); /* oklch */ color: oklch(56.1% 0.121 250.9);
Tailwind
colors: {
custom: {
50: '#7d9ece',
500: '#3778b9',
950: '#000000',
},
}SCSS
$custom: #3778b9; $custom-light: #7d9ece; $custom-dark: #000000;
JSON
{
"hex": "#3778b9",
"rgb": {
"r": 55,
"g": 120,
"b": 185
},
"hsl": {
"h": 210,
"s": 54.167,
"l": 47.059
},
"oklch": {
"l": 0.56143,
"c": 0.12103,
"h": 250.9
},
"luminance": 0.17748
}Semantic roles & 50–950 ramp
primary
#3778B9
secondary
#C8A684
accent
#944ADE
background
#F8F9FC
surface
#EFF2F9
border
#CACCD2
text
#0B0E13
muted
#7C7E82