These lighting gels pack has red, blue and yellow gels to help you achieve you lighting goals.
Q: Is it a gel here,... or can recommend a gel that gives a warm white color?
A: This depends on your lighting. To get that white lighting, you'll want to look at where your light sits on the spectrum first and then add a color on the opposite end to balance it out. For example, I have lights that emit a rather yellowish color. By using a cyan or blue gel, I can bring that color back to the white center of the color wheel.