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Check if the given RGB color code is valid or not

  • Last Updated : 06 Dec, 2021

Given three numbers R, G and B as the color code for Red, Green and Blue respectively as in the form of RGB color code. The task is to know whether the given color code is valid or not.

RGB Format: The RGB(Red, Green, Blue) format is used to define the color of an HTML element by specifying the R, G, B values range between 0 to 255. For example: RGB value of Red color is (255, 0, 0), Green color is (0, 255, 0), Blue color is (0, 0, 255) etc.

   color: rgb(R, G, B);

Note: The color code is valid when all numbers are in the range [0, 255].

Examples:

Input: R=0, G=100, B=255
Output: True
Explanation: Every color is in range [0, 255]

Input: R=0, G=200, B=355
Output: False
Explanation: Blue is not in range [0, 255]

 

Approach: To check if the color code is valid or not we need to check if each of the color is in the range [0, 255] or not. If any of the color is not in this range, return false, else return true.

Below is the implementation of the approach:

C++




#include <iostream>
using namespace std;
 
// Function to check validity
// of the color code
bool isValidRGB(int R, int G, int B)
{
 
    if (R < 0 || R > 255)
        return false;
    else if (G < 0 || G > 255)
        return false;
    else if (B < 0 || B > 255)
        return false;
    else
        return true;
}
 
// Driver code
int main()
{
 
    int R, G, B;
 
    // Check if rgb(0, 0, 0) is valid or not
    R = 0, G = 0, B = 0;
    (isValidRGB(R, G, B)) ? cout << "true\n"
                          : cout << "false\n";
 
    // Check if rgb(0, 100, 255) is valid or not
    R = 0, G = 100, B = 255;
    (isValidRGB(R, G, B)) ? cout << "true\n"
                          : cout << "false\n";
 
    // Check if rgb(0, 200, 355) is valid or not
    R = 0, G = 200, B = 355;
    (isValidRGB(R, G, B)) ? cout << "true\n"
                          : cout << "false\n";
 
    // Check if rgb(-100, 0, 255) is valid or not
    R = -100, G = 0, B = 255;
    (isValidRGB(R, G, B)) ? cout << "true\n"
                          : cout << "false\n";
    return 0;
}

Java




class GFG {
 
    // Function to check validity
    // of the color code
    public static boolean isValidRGB(int R, int G, int B) {
 
        if (R < 0 || R > 255)
            return false;
        else if (G < 0 || G > 255)
            return false;
        else if (B < 0 || B > 255)
            return false;
        else
            return true;
    }
 
    // Driver code
    public static void main(String args[]) {
 
        int R, G, B;
 
        // Check if rgb(0, 0, 0) is valid or not
        R = 0;
        G = 0;
        B = 0;
        if (isValidRGB(R, G, B))
            System.out.println("true");
        else
            System.out.println("false");
 
        // Check if rgb(0, 100, 255) is valid or not
        R = 0;
        G = 100;
        B = 255;
        if (isValidRGB(R, G, B))
            System.out.println("true");
        else
            System.out.println("false");
 
        // Check if rgb(0, 200, 355) is valid or not
        R = 0;
        G = 200;
        B = 355;
        if (isValidRGB(R, G, B))
            System.out.println("true");
        else
            System.out.println("false");
 
        // Check if rgb(-100, 0, 255) is valid or not
        R = -100;
        G = 0;
        B = 255;
        if (isValidRGB(R, G, B))
            System.out.println("true");
        else
            System.out.println("false");
    }
}
 
// This code is contributed by saurabh_jaiswal

Python3




# Function to check validity
# of the color code
def isValidRGB(R, G, B) :
 
    if (R < 0 or R > 255) :
        return False;
         
    elif (G < 0 or G > 255) :
        return False;
         
    elif (B < 0 or B > 255) :
        return False;
         
    else :
        return True;
 
# Driver code
if __name__ ==  "__main__" :
 
    # Check if rgb(0, 0, 0) is valid or not
    R = 0; G = 0; B = 0;
     
    if isValidRGB(R, G, B) :
        print("true")
    else :
        print("false")
 
    # Check if rgb(0, 100, 255) is valid or not
    R = 0; G = 100; B = 255;
     
    if isValidRGB(R, G, B) :
        print("true")
    else :
        print("false")
 
    # Check if rgb(0, 200, 355) is valid or not
    R = 0; G = 200; B = 355;
     
    if isValidRGB(R, G, B) :
        print("true")
    else :
        print("false")
         
    # Check if rgb(-100, 0, 255) is valid or not
    R = -100; G = 0; B = 255;
     
    if isValidRGB(R, G, B) :
        print("true")
    else :
        print("false")
 
    # This code is contributed by AnkThon

C#




using System;
public class GFG {
 
    // Function to check validity
    // of the color code
    public static bool isValidRGB(int R, int G, int B) {
 
        if (R < 0 || R > 255)
            return false;
             
        else if (G < 0 || G > 255)
            return false;
             
        else if (B < 0 || B > 255)
            return false;
             
        else
            return true;
    }
 
    // Driver code
    public static void Main(string []args) {
 
        int R, G, B;
 
        // Check if rgb(0, 0, 0) is valid or not
        R = 0;
        G = 0;
        B = 0;
        if (isValidRGB(R, G, B))
            Console.WriteLine("true");
        else
            Console.WriteLine("false");
 
        // Check if rgb(0, 100, 255) is valid or not
        R = 0;
        G = 100;
        B = 255;
        if (isValidRGB(R, G, B))
            Console.WriteLine("true");
        else
            Console.WriteLine("false");
 
        // Check if rgb(0, 200, 355) is valid or not
        R = 0;
        G = 200;
        B = 355;
        if (isValidRGB(R, G, B))
            Console.WriteLine("true");
        else
            Console.WriteLine("false");
 
        // Check if rgb(-100, 0, 255) is valid or not
        R = -100;
        G = 0;
        B = 255;
        if (isValidRGB(R, G, B))
            Console.WriteLine("true");
        else
            Console.WriteLine("false");
    }
}
 
// This code is contributed by AnkThon

Javascript




<script>
 
    // Function to check validity
    // of the color code
    const isValidRGB = (R, G, B) => {
 
        if (R < 0 || R > 255)
            return false;
        else if (G < 0 || G > 255)
            return false;
        else if (B < 0 || B > 255)
            return false;
        else
            return true;
    }
 
    // Driver code
 
    let R, G, B;
 
    // Check if rgb(0, 0, 0) is valid or not
    R = 0, G = 0, B = 0;
    (isValidRGB(R, G, B)) ? document.write("true<br/>")
        : document.write("false<br/>");
 
    // Check if rgb(0, 100, 255) is valid or not
    R = 0, G = 100, B = 255;
    (isValidRGB(R, G, B)) ? document.write("true<br/>")
        : document.write("false<br/>");
 
    // Check if rgb(0, 200, 355) is valid or not
    R = 0, G = 200, B = 355;
    (isValidRGB(R, G, B)) ? document.write("true<br/>")
        : document.write("false<br/>");
 
    // Check if rgb(-100, 0, 255) is valid or not
    R = -100, G = 0, B = 255;
    (isValidRGB(R, G, B)) ? document.write("true<br/>")
        : document.write("false<br/>");
 
    // This code is contributed by rakeshsahni
 
</script>

 
 

Output
true
true
false
false

 

Time Complexity: O(1)
Auxiliary Space: O(1)

 


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