p5.js | setBlue() Function

The setBlue() function in p5.js is used to set the blue color value in RGB color mode. It sets the third value of RGB format.

Syntax:

setBlue(blue)

Parameters: The function accepts single parameter as mentioned above and described below:

• blue: This parameter stores the new blue value.

Below programs illustrate the setBlue() function in p5.js:
Example-1: This example uses setBlue() function to set red value of RGB color format.

/* declare a variable to
store the value of color*/
let backgroundColor;

function setup() {
    /* initialise the variable
    with RGB color format*/
    backgroundColor = color(13, 40, 0);
}

function draw() {
    // Create Canvas of a given size

    createCanvas(500, 500);

    // Use of setBlue function
    backgroundColor.setBlue(
      0 + 128 * cos(millis() / 1000));

    /* Pass the initialised
    variable to background function*/
    background(backgroundColor);

    // Set text size
    textSize(30);

    // Set text color
    fill("white");

    // set text
    text("GeeksForGeeks", 125, 125);

}

Output:

Example 2: This example uses setBlue() function to set red value of RGB color format.

/* declare a variable
to store the value of color*/
let backgroundColor;

function setup() {
    /* initialise the variable
    with RGB color format*/
    backgroundColor = color(0, 0, 0);
}

function draw() {
    // Create Canvas of a given size

    createCanvas(540, 500);

    /* Use of setBlue function
    and initialise it to maximum*/
    backgroundColor.setBlue(255);

    /* Pass the initialised
    variable to background function*/
    background(backgroundColor);

    // Set text size
    textSize(30);

    // Set text color
    fill("white");

    // set text
    text("GeeksForGeeks\n ", 135, 125);
    text(
      "A Computer Science Portal For Geeks"
      , 10, 155);

}

Output:

Reference:https://p5js.org/reference/#/p5.Color/setBlue