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What is the RGB code for yellow in Arduino?

Published in Arduino Color Codes 2 mins read

The RGB code for yellow in Arduino is (255, 255, 0).

This means that to display yellow using an RGB LED connected to an Arduino, you would set the red and green components to their maximum value (255), while setting the blue component to its minimum value (0).

Here's a breakdown:

  • Red: 255 - Full intensity of red light.
  • Green: 255 - Full intensity of green light.
  • Blue: 0 - No blue light.

Combining full red and full green light creates the color yellow. In the Arduino environment, you would use these values when controlling RGB LEDs.

Here's an example of how you might use this in Arduino code:

#define RED_PIN 9
#define GREEN_PIN 10
#define BLUE_PIN 11

void setup() {
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
}

void loop() {
  // Set the LED to yellow
  analogWrite(RED_PIN, 255);
  analogWrite(GREEN_PIN, 255);
  analogWrite(BLUE_PIN, 0);

  delay(1000); // Display yellow for 1 second
}

In this example, analogWrite() is used because most Arduino boards use Pulse Width Modulation (PWM) to control the brightness of the LEDs connected to digital pins. The values 0-255 represent the duty cycle of the PWM signal, effectively controlling the intensity of each color.

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