Why are there to sets of colors in Korean?
Why are there two sets of colors in Korean, and when should each be used? Please go into detail, because I find this kind of confusing.

Question

Why are there to sets of colors in Korean? 
Why are there two sets of colors in Korean, and when should each be used? Please go into detail, because I find this kind of confusing.

Answer

I guess what you mean is these pairs:
빨강/ 빨간색
검정/ 검은색

Each pair indicates the same thing, but when you want to put '색'(color) in the expression, you use the right one, and only using the left one makes no change in meaning.

ex)
우체통은 빨간색이다. -> 빨간 우체통/ 빨강 우체통
내 머리카락은 검은색이다. -> 검은 머리카락/ 검정 머리카락

AHHHHHHHHHHHH!!!!!!!!!!!!!
I know but can't explain well..

Answer

It's because we also use sino-Korean words(=hanja-eo, 한자어) which were affected by Chinese, hanzi(汉字), and the sino-Korean make up more than 65% of Korean vocabularies. The sino-Korean are often used in written or formal situations.

For example,(as to "red color")
빨강 = native Korean word
적색(赤=red,色=color) = sino-Korean word
빨간(the base form is "빨갛다") + 색(色) = mixed^^/

\^o^/

Answer

I'm sorry for taking so long. I went over my notes and I noticed i had two sets colors for the same colors. For example.................

yellow 황색              yellow 노란색
orange 오렌지색      orange 주황색
pink 핑크                 Pink 분홍색
green 녹색               green 초록색
blue 푸른                 Blue 파란
brown갈색               Brown 밤색
white화이트             White 하얀색        white 흰색
black검정                 Black 검은색

Answer

she means, 
빨강/적, 
파랑/청, 
노랑/황

Answer

I can't understand your question. Would you write examples?