"Dark reddish" means a color that is similar to red, but slightly darker.
Sentences with «dark reddish»
Seeds range from dark reddish brown to yellowish brown to ivory. (wholegrainscouncil.org)
Curiously, when the light in the light box is illuminated, the entire imagery of the universe virtually disappears, and the window pane is now a silhouette of darker reddish tones. (sfaq.us)
They will puff up like Rice Krispies and start turning dark reddish brown, almost maroon. (treehugger.com)