The colour of your stool can change depending on what you've been eating. Some foods, like certain types of fish, have naturally indigestable fats and can cause orange, oily stool. Another possibility is fat malabsorption. It might be a good idea to keep track of your diet.
If you had one bowel movement that was orange in color I wouldn't worry about it. It is unlikely that this is blood in your stool. However if this has happened more than once I would recommend seeing a doctor about this.