This Thread is for Tips and Helpful Links for Making Stylesheets ONLY. 
Do NOT ask stylesheet questions in this thread and let's leave it for helpful things.
If you have a helpful tip, trick, or link feel free to use this thread to share it.

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Stylesheets made by members and posted here at Support
You must give credit and a link back to the original author of a stylesheet if you do a remake or a conversion of a stylesheet or theme.
Stylesheet Authors Please Read

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w3schools is invaluable for learning css:
http://w3schools.com/css/default.asp

Color coded forum - see where each color is used:    
Its sole purpose is for you to look around and to be able to easily see where the areas are in the css.
You do not need to signup to use it.
Color Coded Stylesheet Help

Tutorial for the Default CSS:
Written by patrick from the simplemachines forum, describes each section in the css (with pictures)  (a lot of help)
patrick's tutorial

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Background Help:
How to put a background image on your forum
w3schools background css info
How to put an image on top of the background

Center Forum /  Make exact width:
How to center the forum or make it an exact width

Tab Help:
Change Tab Colors

How to Change the News Fader Font and Link Colors:
Change News Fader Font and Link Colors

Color Code Sites:
http://html-color-codes.com/
http://www.december.com/html/spec/color.html
http://www.webmonkey.com/webmonkey/reference/color_codes/
http://www.computerhope.com/htmcolor.htm#03
http://instant-eyedropper.com/info/html_color_code/

Find Colors that Go well together with:
Color Blender

Select Colors from anywhere on the screen with:
Instant Eyedropper


Need to change the color of the fonts only in this area?


Add this to your css, change the color code to what you need.

Doing a lot of css editing and tired of having to keep scrolling to the bottom of the page?

Put this in your footer:  <a name="bottom"></a>

Make a custom tab    (Admin > Manage Styles > Custom Tabs)
Title:     Down
URL:     #bottom

When you click the "down" tab it will take you to the bottom of the forum.
Its really helpful in Admin, when doing a lot of css editing as you can get to
the bottom of the screen quickly.

(actually its helpful in many places on the forum)