Viki have impossed the dar mode.There are lots of us who find it stressful and tired. Where is the problem in having both options to work? This link is to ask viki at least for the optional click or to keep the light mode.
Please, sign this petition and send it to allthe volunteers and viewers who have a viki account.
https://docs.google.com/spreadsheets/d/14_UiHmiLAbZyb7c6OftVEIQ54guu36FkCW6x_UWq5J8/edit?usp=sharing