#3777B7#3777B7
#3777B7 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.8% C 0.119 H 250.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).
Color values
| HEX | #3777B7 |
|---|---|
| RGB | rgb(55, 119, 183) |
| HSL | hsl(210, 54%, 47%) |
| HSV | hsv(210, 70%, 72%) |
| CMYK | cmyk(69.9%, 35%, 0%, 28.2%) |
| CIE-LAB | lab(48.79, 0.88, -39.74) |
| CIE-LCH | lch(48.79, 39.75, 271.26°) |
| OKLab | oklab(55.8% -0.0392 -0.1128) |
| OKLCH | oklch(55.8% 0.119 250.8) |
| XYZ | xyz(16.7164, 17.4230, 47.2726) |
| Luminance | 0.1742 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Windows Blue
#3778BF
ΔE00 1.07
Bluish
#2976BB
ΔE00 1.15
Flat Blue
#3C73A8
ΔE00 2.19
Medium Blue
#2C6FBB
ΔE00 2.99
Muted Blue
#3B719F
ΔE00 3.60
Dull Blue
#49759C
ΔE00 3.86
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3777B7 #B77737
analogous
#37B7B7 #3777B7 #3737B7
triadic
#3777B7 #B73777 #77B737
tetradic
#3777B7 #B737B7 #B77737 #37B737
square
#3777B7 #B737B7 #B77737 #37B737
split-complementary
#3777B7 #B73737 #B7B737
monochromatic
#1B3A59 #295888 #3777B7 #5D96CE #8CB4DC
Accessibility & contrast
On white
4.68
#3777B7 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.48
#3777B7 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #3777B7
4.68:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3777B7 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3777B7 | 1.00 | 4.68 | 4.48 | 4.68 |
| #FFFFFF | 4.68 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.48 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 4.68 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5A7BBA
Deuteranopia (green-blind)
#486EB6
Tritanopia (blue-blind)
#00868E
Achromatopsia (no color)
#747474
Design tokens & code
CSS
--color: #3777b7; /* rgb */ color: rgb(55, 119, 183); /* oklch */ color: oklch(55.8% 0.119 250.8);
Tailwind
colors: {
custom: {
50: '#7d9dcd',
500: '#3777b7',
950: '#000000',
},
}SCSS
$custom: #3777b7; $custom-light: #7d9dcd; $custom-dark: #000000;
JSON
{
"hex": "#3777b7",
"rgb": {
"r": 55,
"g": 119,
"b": 183
},
"hsl": {
"h": 210,
"s": 53.782,
"l": 46.667
},
"oklch": {
"l": 0.55797,
"c": 0.11944,
"h": 250.8
},
"luminance": 0.17425
}Semantic roles & 50–950 ramp
primary
#3777B7
secondary
#C7A583
accent
#944BDD
background
#F8F9FC
surface
#EFF2F9
border
#CACCD2
text
#0B0E13
muted
#7C7E82