TAG rainbow one-stroke question

I see that TAG no longer makes the one-stroke with the six colors in it (regular rainbow, not neon). I love this one-stroke and use it a lot. If I can't get it, I'll have to go with the one which is just: RED/ YELLOW/ LIGHT BLUE/ PURPLE.

Has anyone had experience with this?

Do the red and yellow mix to produce some orange? And does the yellow and blue bring out any green?

Thanks.

Love 4 rainbow. Much cleaner and vibrant than many colored rainbows. It's one of the few I keep a backup of.

Here's Emma...used it for the flowers too:

Denise - thank you for these examples. Just what I wanted to know - I'm about to place a major stock-up order, and now I'll go with the 4 instead of searching around for the 6 leftovers. And your work is stunning, The one with the bird is ... well, just ... wow.  

I agree with Denise - the Rainbow 4 blends as you use it to make a rainbow, and looks (for me, at least) less muddy than the 6-colour one. Cocktail is a good neon rainbow too.

In other news: Denise, could Emma GET any prettier???