Many and varied gassed do this but they rarely occur naturally unless you include a spark or "ignition source". The knowledge required to handle such gases safely is implied by knowing what they are so it is unlikely any responsible responder will answer further in such an anonymous context
Blue and red mixed together make violet, or purple.
Yellow and blue make green when mixed together.
Blue and red make purple when mixed together.
Green and red mixed together make brown.
Yellow and blue mixed together make green.
Blue and red mixed together make violet, or purple.
Yellow and blue make green when mixed together.
Red and yellow make orange when mixed together.
Blue and red make purple when mixed together.
Green and red mixed together make brown.
Snow and strong winds are mixed together to make a blizzard.
Yellow and blue mixed together make green.
Yes, blue and yellow make green when mixed together.
When they are mixed together, red and yellow create orange.
yellow and blue :)
Red and white mixed together will make the color pink.
Purple and red make a shade of dark red or maroon when mixed together.