Happens in both 1.38.0 and current insiders (7edc8f786e065edbc9540f1e19ebd9220b9e0cf9) Tested with ```json5 "workbench.colorCustomizations": { "inputOption.activeBackground": "#ff0000" } ``` It should have bright red background in checked state instead of gray. <img width="306" alt="Screen Shot 2019-09-05 at 13 02 18" src="https://user-images.githubusercontent.com/96958/64336499-6a522080-cfdd-11e9-89d1-73c0e9f61adc.png">
