Usage: rgb(rAmount, gAmount, bAmount)
This filter changes the amount of color in each of the three channels.
rAmount - The amount of redness in the picture. Can range from -100 to 100 in percentage. gAmount - The amount of greenness in the picture. Can range from -100 to 100 in percentage. bAmount - The amount of blueness in the picture. Can range from -100 to 100 in percentage.
http://thumbor-server/filters:rgb(20,-20,40)/some/image.jpg
/some/image.jpg){kind=link}
Picture before the contrast filter
Picture after RGB filter