I want to change my thermostat but the wires don't match the color code on the new thermostat

I have asked to have this moved to Heating and cooling. There is a sticky theere that should be helpful, https://www.askmehelpdesk.com/heating-air-conditioning/heating-cooling-maintenance-repair-troubleshooting-frequently-asked-questions-58313.html

If the old thermostat only had 2 wires likely connecting one to R or RH and the other to W will work.

(Question moved from Introductions to Heating & Air Conditioning)

Give us the color of wires with the old t-stat and what they went to and then the options on the new t-stat.