(Place lock widget in var/mobile/library/LockHTML and the iWidget in var/mobile/library/iWidget.)
Need LockHTML2 and iWidget from cydia and activate lockHTML in settings and iWidget by long pressing the screen.
To change the color codes google color schemer and select color. Use the 6 digit code and edit the colors in the widget theme .html document under each section like clock, date, etc. under the color# then respring. Same way as editing the weather code. Google weather code for your area. Usually starts with letters.
This adorable theme is from GlamourThemes and the weather is not made by me. It's from Saha.