You can use the Volume_Sample_RGB and Volume_Sample_Float mixed with a rgb ramps to play with the color values between the scattering color and transparency color.
https://support.solidangle.com/display/A5AF3DSUG/Volume+Sample+RGB
https://support.solidangle.com/display/A5AF3DSUG/Volume+Sample+Float
Yes, in Volume_Sample_RGB i can change same parameters! but when i can find rgb ramps in 3dsmax?
The Gradient map can be used once Legacy 3ds Max Map support is enabled in the System tab.