Lesson #1
Red + Yellow + Black = Brown
Red + Yellow + White = Peach
Therefor brown & white are the same colour - ergo skin color is irrelevant.

Lesson#2
Primary colours in pigment are Red - Yellow - Blue
Red + (Yellow + Blue) = Mauve
Red + Green = Mauve

Primary colours in light are Red - Blue - Green
Red + Green + Blue = White
Red + Green = Yellow
I don't know what this one should mean - therefor it's a conspiracy.

Primary colours of light are Red Green and Blue.

Primary colours of pigment are Cyan, Magenta, Yellow and Black.

I'm a geeky printer so this bugs the hell out of me. Blue is a mix of Cyan and Magenta, so it's not primary. It's a mix. Red is a mix of Magenta and Yellow.

Maybe they just weren't clever enough to find rhymes for Magenta or Cyan. It's just a shame they had to be wrong.

See Here: http://www.diycalculator.com/imgs/console-09.gif

>> ^robbersdog49:

Primary colours of light are Red Green and Blue.
Primary colours of pigment are Cyan, Magenta, Yellow and Black.
I'm a geeky printer so this bugs the hell out of me. Blue is a mix of Cyan and Magenta, so it's not primary. It's a mix. Red is a mix of Magenta and Yellow.
Maybe they just weren't clever enough to find rhymes for Magenta or Cyan. It's just a shame they had to be wrong.

@robbersdog49
This will forever be a discussion between people who work with colours.
In the print industry, the photographic industry or the artists of the world.

The truth is it's different for what ever your process is.
RGB for Light
CMYK for Print
& RYB for artists
I work in all three industries and need to switch my brain back and forth between them constantly.

What they are showing here at the most primary level is the RYB colour wheel that kids learn first. It's basic paints and crayons. These are the base pigments used in paints; Cadmium Yellow & Red, Phthalocyanine (Phthalo) Blue or Cobalt Blue. The closest paint colour to magenta would be a Quinacridone.
The primary colours are the ones all others are made from. These are the ones you can't make by adding something else. We use the chemicals that are the absolute most pure to create these pigmants. They are the highest level of purity and intensity a colour can be. Once you start mixing them, the intensity can only be reduced.
Of course these would be balanced using a titanium white, Iron Oxide Black (plus Umber & Sienna).

As we get older, science class points out that light works differently and is a process that works in subtractive colour. Light being white and the other colours being made by adding filters to block various parts of the spectrum.A blue surface isn't so much blue as it just holds on to all wavelengths of the spectrum but reflects the part of the spectrum that is blue. (Etc.)

In indusry, (and most people still don't under stand this process), the printing process uses Cyan, Magenta, Yellow and Key (Black) (in a transparent or dot)layered fashion to simulate a full colour image.

And don't forget Hexachrome (CMYKOG) which also ads the Orange and Green coloured inks (because simple CMYK cannot simulate every colour).

The CMYK colour system is a simulation of colour and are NOT primary colours. Cyan, Magenta, Yellow and Black are the primary colours within that system only.

ROY G BIV
R Y B are more accurately the Primary Colours in the light and colour spectrum. The coulours between them OG(I)V are all Secondary colours.

*Sidenote: Magenta is an odd coulour which comes from that one man out theory. Indigo is the invisible colour in the spectrum that breaks the rule. That's why in order to create a Cyan colour in paint, we use a Quinacridone pigment. Quinacridone is a transparent colour only and can't be made opaque without mixing it with another pigment and loosing it's purity. It's a damm expensive pigment so it's rarely used.

>> ^robbersdog49:

Primary colours of light are Red Green and Blue.
Primary colours of pigment are Cyan, Magenta, Yellow and Black.
I'm a geeky printer so this bugs the hell out of me. Blue is a mix of Cyan and Magenta, so it's not primary. It's a mix. Red is a mix of Magenta and Yellow.
Maybe they just weren't clever enough to find rhymes for Magenta or Cyan. It's just a shame they had to be wrong.