I wrote a paint.net plugin that generates hexadecimal strings from a colored image.
(http://i.imgur.com/W8hTZsE.png)(http://i.imgur.com/bI4IWyu.png)
(http://i.imgur.com/y9y09Mm.png)(http://i.imgur.com/1rjbRrc.png)
(http://i.imgur.com/blhztd4.jpg)(http://i.imgur.com/NFAq3c8.png)
The plugin is made so easy to use for speeding up sprite management in order to get to coding ! :D
1. So to use it first you will have to install the free software Paint.net (if you dont have it already) getpaint.net (http://getpaint.net).
2. Next you will need to download my plugin (its called in effect in paint.net but i used it differently).
https://drive.google.com/open?id=0BwL8OxR4bj83NFlIaFFpNHJSWUk&authuser=0 (https://drive.google.com/open?id=0BwL8OxR4bj83NFlIaFFpNHJSWUk&authuser=0)
3. Put this file in the folder Paint.NET/Effects/
4. Startup Paint.NET, open up an image, select it with CTRL+A, click on EFFECTS, click PNGtoHEX which should be at the bottom.
You will get a popup like this
(http://i.imgur.com/23s1A5E.png)
Select it and click CTRL+C to copy it
After copying it there will be some extra dashes in the beginning and the end of your clipboard just delete those, i am not sure how to remove them since they come with the default messagebox stuff...
Anyways! thats all i hope you find this useful, if you have any feature suggestions i will for sure implement.