To pour 2 colors together, have two pots or cups hot and ready with the colors you want. Make sure you pour the second color almost immediately after your first pour so the colors will blend together. If you do a search on the forum for "pouring 2 colors" or "pouring veins", you can find some cool information.
You can find the oxblood color in the new Lure Craft catalog. There are different variations of oxblood. Some are cinnamon, reddish/brown, reddish/orange, reddish/purple, etc. Lure Craft's version is more of an orange or pumpkin color.
You can also make your own oxblood by mixing small amounts of red and pumpkin or purple and pumpkin, depending on what shade you're looking for.
Chris