Blue accent in Reject button of the dialer

/e/ version: Multiple
Device model(s): OnePlus 3T(0.18-20210814129945), FP3+(0.18-q-20210812129623), GS290(0.18-20210802127596)
Device rooted: no

Summary

Blue accent in Reject button of the dialer.

Steps to reproduce

Get a call on the device OR make a call from the device.

What is the current behavior?

The accent colour is blue.

What is the expected correct behavior?

The accent colour should be white.

Relevant logs (adb logcat)

Relevant screenshots

Workaround

Possible fixes