Such a tough view/angle to draw – which I why I never do it – ha! Do a side view next time – and think of showing me more light green near the highlight so you have a gradation form the highlight out to a lighter green and then darker as it curves away. You could even try putting down the lightest yellowish green over the whole form (except for the highlight) in watercolor, let it dry and then tone with pencils.
Such a tough view/angle to draw – which I why I never do it – ha! Do a side view next time – and think of showing me more light green near the highlight so you have a gradation form the highlight out to a lighter green and then darker as it curves away. You could even try putting down the lightest yellowish green over the whole form (except for the highlight) in watercolor, let it dry and then tone with pencils.