In medium bowl whisk together flour, cinnamon, and sugar (if using). Gradually whisk in melted butter and warm milk, alternating between each. Mix in orange zest, juice, and vanilla. Strain through mesh sieve to remove clumps.
To create green dye, blend or finely chop spinach. Squeeze spinach until juice comes out, and strain over a mesh sieve.
Evenly divide mixture into 5 bowls. Add dye to 4 of the bowls (red, orange, green, blue). The yellow bowl does not need dye.
Spray medium pan with vegetable oil and use paper towel to spread evenly over the pan. Heat on medium until pan is hot, and pour 1/4 - 1/2 cup mix into center of the pan. Rotate pan so mixture spreads evenly over entire surface. Cook until the bottom is lightly browned and able to be lifted with a spatula, about two minutes. Flip and cook other side, for about one minute. Set aside on wire cooking rack. You should make 3 crepes of each color.
Allow crepes to cool and prepare whipped cream. Put heavy whipping cream, vanilla, cinnamon, orange zest, orange juice, and sugar (if using) into a medium mixing bowl. Mix on low speed using a hand or stand mixer for a few minutes, then raise to high speed until mixture is light and fluffy.
Prepare fruit - slice each fruit about 1/2in. thick and set aside.
Place one blue crepe on a plate and cover with a thin layer of whipped cream. Place grapes and blueberries on top. Smooth a thin layer of whipped cream on a second crepe, and place whipped cream side down on the fruit. Cover with whipped cream and fruit.
Repeat above steps for all crepes and fruit. Match the fruit to the correct color: blue - grapes/blueberries, green - kiwis, yellow - bananas, orange - oranges, red - strawberries.