Solved! I did this and it still did not work please help!

[lovely100180]

My DVD player won't hook up to my new hair 55 in UHD TV 4K without being black and white even when I select composite and plug the yellow into the green of what it does clear the black and white image up more but it doesn't turn it to color please help me! This is the only way we have to watch TVs through the DVD player

 

[SkyNetRising]

Model names of TV and DVD player?
Why don't you use HDMI cable?

 

[BFG-9000]

If you see a green RCA that means it is a "component" jack. You are trying to use "composite," which is not the same.

 

[lovely100180]

Model names of TV and DVD player?
Why don't you use HDMI cable?

Because it's a haier 4k HD TV and an older Sony DVD player not too old but doesn't have hdmi outlet on it I just need it so it's not black and white please!

 

[SkyNetRising]

You still haven't shared any model names with us.
"Haier 4k HD TV" and an "older Sony DVD player" doesn't really tell very much.