Well MrsZ, today is your lucky day! Here in the USA (and world-wide), we have a company called
ETC-Selador. They make a variety of
LED fixtures, almost all of which use seven colors of
LED. Different models use slightly different colors, or differing quantities of each color, however. Each intended for a specific purpose.
The seven colors are (for the
Vivid-R, each model varies slightly:
Red,
Red Orange,
Amber,
Green,
Cyan,
Blue,
Indigo. (Font colors VERY approximate!)
According to the
SeladorToolkit iPhone app (Do you have iPhone/iPod/iPads in South Korea? I'm sure you do. It's a free app, and fun to
play with.)
(for the
Vivid-R), to make "WHITE" the percentages are:
Red-83%, Red Orange-100%, Amber-100%, Green-100%, Cyan-80%, Blue-61%, Indigo-0%. (For your application, you'll have to cheat a little on the Indigo and use it above 0%, your result will
skew toward Blue, but you can't add more Red or Green, they're already at 100%.)
The percentages and colors will vary muchly depending on your fixtures' light source (
incandescent,
gaseous discharge, arc,
etc.), and their color mixing
system (
RGB,
CMY,
etc.) You could probably accomplish something close with
gels in
conventional (non-"smart") lights. If you tell use what brand (
Lee Filters,
RoscoLux, E-Colour,
etc.) of colour media you use or have access to, and what your lamps are, we can help with specific color filter numbers.
The circular
stage will be a problem if you have each light 1/7th of the way around the circle. All seven may mix to WHITE on the floor at center, but won't mix in the air until they hit something. So it will look different to every audience member if they're sitting all the way around the
stage.
This is all theory--I've only mixed colors with three lights using Red, Green, and Blue colors, see
RGB Color Mixing. If you try it and have satisfactory results, please post back here with what you did, how it worked, and if possible, pictures. We love pictures.