Lord Rama was blue-black.
Krishna was Black.
The term Krishna means Black.
Both Rama and Krishna are the Avatars of Vishnu.
Then why the difference in skin tone?
I checked.
Vishnu appears as,in
Krita Yuga
White, with four arms,with hair pulled up(Jatamakuta),
Wearing Maravuri, clothes made of barks,
with Akshamala Kamandalu and Dhanda.
Treta Yuga.
Reddish,
Golden hair-locks,
With Vedas as Four Arms.
Dwapara Yuga.
Blue-black,
With Peethamabra,
Sri Vatsa,,
Chank(Conch),Chakra, Gatha.
Kali Yuga.
Black,
Bare arms and Arrows.
Source.Bhagavatha Purana Chapter 30.



EXCELLENT Share ! Being a novice , having not read Bhagavatha Purana, it was a Treat for me browsing through your Blog ! Thank You !