This is a sketch of planet Neptune near 4th magnitude star 90Aqr. I was using a 26mm eyepiece for a magnification of 70x.
I did examine pale blue Neptune at much higher magnification but with no surface details seen. Because of its current location near the bright 4th magnitude star (90 Aqr.), Neptune at 7.8 magnitude is easy to locate.
This sketch is on a large white index card. Using gimp 2.8 I inverted the sketch, cut it out and pasted to a black background.
Neptune was originally drawn with a brown colored pencil and 90 Aqr. was drawn with a blue colored pencil to get correct color upon inverting.