Improve brush color
Improve brush color

Uses the same color as table builder. When the brush is updating, the color changes.

TBR=benjhayden@chromium.org

Review URL: https://codereview.chromium.org/1382473002

benschmaus/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,0x90sled/catapult,0x90sled/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,0x90sled/catapult,SummerLW/Perf-Insight-Report,SummerLW/Perf-Insight-Report,sahiljain/catapult,sahiljain/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,sahiljain/catapult,catapult-project/catapult-csm,SummerLW/Perf-Insight-Report,catapult-project/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult,benschmaus/catapult,sahiljain/catapult,catapult-project/catapult,sahiljain/catapult,catapult-project/catapult,benschmaus/catapult,sahiljain/catapult,benschmaus/catapult