Pilot Iroshizuku Momiji fountain pen ink is a red ink inspired by autumn leaves.
I think there's a tint of magenta in the red so it's not like pure red.
When the ink touches paper for the first time, it appears almost fluorescent. It then dulls down quickly to for the darker red. It's a beautiful shade of red.
This ink has a good contrast against paper. There's a slight sheen, a gradation of colour, to the strokes, but the sheen can be difficult to spot because the ink is quite dark.
For writing and drawing purposes, this ink performs well.
Below are direct links to the ink on Amazon.