Coyotes see in shades of grey, they are color blind at best.
There have been many debates here about "color of lights". You can search and find about any info you want.
Here is a reply that I sent to a recent email:
We are "infamous" for our use of white lights. I grew up using red, as did all of us. Everybody said "coyotes cant see red". Myself, and I think the rest of the country took that as gospel. It was actually Skeet Jones that introduced us to the "white side" years ago. The whole "coyotes cant see red" doesnt hold water when you are basically blinding them with the light as they come in. If they couldnt see red they would see right through it, and see you. We use a dimmer to bring the intensity of the light down, or use a light thats not as bright. This is actually all a red filter does, it brings the intensity down. Predators see in shades of grey, they are color blind at best. It does not matter what color you use, or if you use one at all if the intensity of the light is the same. If you bring the intensity of a white light down, say to about how bright a red is, then you can see better and you still dont spook critters. Red is not the majic bullet, good common sense and woodsmanship will kill you way more critters than a red filter.
I can picture some redneck 50 years ago holding a million candle power light and trying to find something to make it "dimmer", cause he couldnt afford to go buy a new one. He probably grabbed a old broken brake light and created the first red filter. Everybody always talked about how "old redneck" kills alot of coyotes and he uses a red light. It must be the "red" that does it, cause they aint killin nothing. Somebody marketed red filters, and probably made millions selling them, while all anybody had to do was go down to the hardware store and buy the cheaper, dimmer light.
This of course is all our personal opinion, and many do not agree with us. Of course after 4 videos, and now a season of TV we dont hear much negativity about it. We flew to Africa and did not take a red filter. We had a great trip and killed over 20 Jackals, and a Caracal. Half way around the world it works too! If we didnt fully believe in our methods we would have packed a filter. I cant see needing any more proof than that.
To answer your question. Yes, white will work on cats as well, man you need to check out our videos! LOL To bring the intensity down further you can also bring the light up and hold them in the "halo" of the light. But as you can see we "burn" everything and I can count on one hand how many coyotes we spook with the light each year. In heavily called areas any light will spook critters. Ive actually spooked way more with red just by making rookie mistakes and not staying calm and quite.
Take care,
Todd Woodall
Predator Pursuit