This is the 14760th most frequent Turkish word.
renginde
"In the color of; colored like."
Here, 'renginde' means 'in the color of' and describes something having the same color as the mentioned item.
Bu kıyafetin renginde bir ceket arıyorum.
I am looking for a jacket in the color of this outfit.
'Renginde' here refers to the attribute of the eyes, indicating 'the same as the color of' something—'the sea' in this case.
Deniz renginde gözlerin var.
You have eyes the color of the sea.
In this sentence, 'renginde' indicates the specific hue or shade of a color, in this case, a 'blue' shade.