I mentioned my disdain for red fountain pen inks recently, but orange and I have a great relationship. I may not use it as frequently as my beloved blue black inks, but orange will always have a place in my rotation when warranted.
Sailor Jentle Apricot Orange is a true, bright orange. On the white Rhodia DotPad page it really pops. While it may not have the variance in shading of Noodler's Apache Sunset, it has moderate shading in its own right, showing a range of orange with hints of yellow. It goes down light and a bit dry from the nib and dries into what is shown in the photos.
In the realm of alternate fountain pen inks Sailor Jentle Apricot ranks right near the top for me. What non-standard colors are your favorites? I'd love to check them out!