EDIT:

Here Android L Keyboard for non root devices, i "modded" apkUninstall google keyboard(Play Store one not AOSP), install this apkGo to Android L Google Keyboard settingsOpen “Advanced settings”Select Color scheme “Material”Tested on Moto G 4.4.2 no rootWill not work on nexus stock no root,because google keyboard is a system app and you cant uninstall it