Comparisons of BMP JPEG and PNG files

Each image is 300x300 (90,000 pixels).
BMP is 3B/pixel (RGB components of pixel). 90,000*3=270,000=264K
JPEG and PNG are compressed.
BMP JPEG PNG
One color
264KB 1KB 1KB
16 colors in 10x10 blocks
264KB 69KB 4KB
16 colors in single pixels
264KB 137KB 63KB