Upload a Logo: Setup -> Organization Settings -> Company Details Tab -> Edit button (on right)
Scroll down to the bottom and click Choose file:
A browser window will open and you can select an image from your computer to use as your company logo. Logo image should be 190:65 pixels in size, cannot exceed 20KB and must be in one of the following image formats: .jpeg, .png, .gif.
THIS LOGO WILL DISPLAY FOR EVERY USER IN THE ORGANIZATION.
Choose your colors: Setup-> Personal Settings ->Theme
- Set Tab Bar Colors and font colors
- Set background color