Single colour effect

[AshirogiMuto]

If anyone knows how to leave just a single colour in a scene and all else to be black and white so the colour stands out like just the blood being red and everything else black and white.Thank you in advance.

[NS]

Mask out the part you want to be the single color, and then change the hue/sat on the masked part to match the color you want.

You'll need to duplicate the original scene before masking.

[AshirogiMuto]

10x a lot u really helped me.

[KamakuraNeko]

If you use Sony Vegas you could probably do that with the secondary color correction too. This is the video I watched to figure it out: http://www.youtube.com/watch?v=JnV0z6jTshM