Here Android L Keyboard for non root devices, i "modded" apk
- http://d-h.st/YmI
Uninstall google keyboard(Play Store one not AOSP), install this apk and change theme
Go to Android L Google Keyboard settings
Open “Advanced settings”
Select Color scheme “Material”
Working great in my Huawei P6 with B132 Firmware...
Source: http://xdaforums.com/showpost.php?p=53716545&postcount=92