# Images Each pixel in the image is represented by 1 bit and so 8 bits are required for each row.There are 8 rows and so 64 bits are required in total. 64 Bits / 8 = 8 Bytes.

If more colour options are required, this will take up additional storage. For example, if each pixel has 4 colour options, then 2 bits would be required (00,01,10,11) for each pixel. In the image above 128 bits would be required. 128 Bits / 8 = 16 Bytes.

If 256 colour options were required, 8 bits would be needed for each pixel (00000000 – 11111111 provides 256 options (numbers 0 – 255)). Therefore 1 byte is required for each pixel, and 64 bytes in total.

### Common Questions

Q. What is colour depth?

A. Colour depth (or bit depth) is the amount of bits required to represented a pixel in an image. The more possible colours, the more bits that will be required and the more realistic the image would be.

Q. How many Bits/Bytes does it take to represent an pixel that can contain 256 different colours.

A. 8 Bits/ 1 Byte can represent 256 different options (eg. numbers 0-255) . Therefore 8 Bits or 1 Byte would be required to represent 256 colour choices.