How maintain colours of the model when exporting from blender to unity

i want to maintain and keep the coloured model from blende, im not talking about texture im talking about the colour: i made a model in blender then i used materials and colorRamp then i export the model as fbx, but when i import it to unity it maintains some colors and discard others and even those colors it maintained are changed to other colors

i dont want to color in unity i feel more comfortable with blender when colouring PLZ need help!!!