I will show you how to get the Hexadecimal code for any color that your computer monitor shows you, so that you can use them in HTML documents and other fancy-schmancy computer stuff. Surprisingly, it uses legal software.
Step 1: Download GIMP
GIMP is good. It has a lot of the stuff Photoshop has, but not all. Perhaps that's why it's free. But still, it's a lot better that crappy old Paint. Anyways, it is a requirement for this instructable. Get it. Don't worry, I'll wait...
Got it? Good. Off we go...
Step 2: Look at your keyboard, next to F12
Okay, now look down. No, not there. There. Good. Now, on your keyboard, look at the top where there are all the keys with the F's on them. No, not the "F" key. The other ones. Are you looking at them? Go to the one that says "F12." Now, look right next to that one. It will say "Print Screen" on it. Remember where that is now.
Step 3: Let's get this party started!
Okay, enough prep. Go to the place that has the color of your choice (for my example, I will use Instructables Orange) and hit "Print Screen."
Step 4: Open up gimp and paste
Start up gimp. If you cant find it, look in the start menu. If you have XP, then it should say "new programs added." Once you've started up GIMP, click "File --> New." Make sure you give it a size that fits the entire thing, of at least that fits what you want to copy. Then, press Control + V. You now have a screenshot of your computer, with the window header and everything! But this is not what we want. Read on.
Step 5: Color picking 101
Put GIMP back up, and select the color picker tool. It looks like a little eyedropper. Put it over the target color, and click. The color will show up in the little-color-sample-preview-thing.
Step 6: CLICK!
Click on the little-color-sample-preview-thing. It will show you the little-color-sample-editor-thing. On the middle left, it will show you... GASP! The Hexadecimal code! We've found it! YAY! Now, be sure to memorize it so you don't forget it!