(Red, Green, Blue are the decimal color values)
Difference in color
[Max(Red
1,Red
2)-Min(Red
1,Red
2)] +
[Max(Green
1, Green
2)-Min(Green
1,Green
2)] +
[Max(Blue
1, Blue
2)-Min(Blue
1,Blue
2)]>500
Difference in brightness
((Red*299) + (Green*587) + (Blue*114)) /1000>125