var c = [175, 100, 220]; // Define color 'c'
fill(c); // Use color variable 'c' as fill color
rect(15, 20, 35, 60); // Draw left rectangle

var blueValue = blue(c); // Get blue in 'c'
console.log(blueValue); // Prints "220"
fill(0, 0, blueValue); // Use 'blueValue' in new fill
rect(50, 20, 35, 60); // Draw right rectangle