Duckies

Im not so sure of the color scheme so far  
(DO NOTE < THIS IS NOT MY  LINEART)
I just shade and blend 

Updated  

Probably best to mention that this is a stock image you are colouring and not your own lineart 

 

THOUGHTS on the Grass texture 

The darker greens under the ducks seem to work well, you could push that contrast a little further. And you seem to be clipping over the lineart in places. It'd be better to set the lineart layer to Multiply and to colour on a layer beneath.