The exhaust coloring sounds normal for a properly leaned engine.

The oil consumption of 1 quart/5 hours sounds higher-than-average. Make sure you're not topping of the oil up to the "6" quart mark. That first quart blows overboard quickly. Typically 150s get much better oil consumption keeping the level between "4" and "5" (i.e. - since there's no "5" mark add a quart of oil when it drops to "4").

-Kirk Wennerstrom
President, Cessna 150-152 Fly-In Foundation
1976 Cessna Cardinal RG N7556V
Hangar D1, Bridgeport, CT KBDR