Screen refresh rate and color quality are typical values for a monitor in a Windows 7 computer. By default, Windows picks the best settings for your computer. However, if you want to change the screen refresh rate and color quality of monitor in Windows 7, follow the below given steps:
1) Right click on Desktop and then, click on “Screen resolution”.
2) Then, click on Advanced Settings.
3) In Monitor and Graphics properties dialog box, go to Adapter tab. Click on “List all modes”. These are the different modes of valid values of screen refresh rate and color quality which are supported by your monitor.
4) Now, go to, Monitor tab, under “Screen refresh rate” drop down menu, select the Screen refresh rate as per your requirements. If there are no other values shown in the drop down menu apart from the default value, then, that means that your monitor does not supports other screen refresh rate values. Under “Colors” drop down menu, select the color quality as per your needs.When you are done, click on “Apply” and then “OK”.