True!The both talk about the overall moral of the story.
For an example
THEME Central 
Jealousy. Mya always wanted the same 
 thing Layla had.
Hard work pays 
Off. Tyianna worked for hours to 
 earn money.
Bravery||||Even though Tim was afriad Of heights he still climbed up the mountain.
So basically a theme is telling you something all in one word and a central idea is giving you details.
Hopes this helps.