Does this 30ct. Franklin look brownish/orange to anyone else

It does not matter if it looks brownish/ornage to anyone. It is not possible to tell an exact hue from a monitor as what is shown depends on your camera, the ambient light when you took the picture, and the monitor on which it is viewed. I would not go as far as saying it might as well be purple. However, beyond saying it is a yellowish colour is ignoring that you cannot be certain of the hue.

Since the stamp was used and is not 'on piece,' it, further, is impossible to tell if the colour is original.

Edit: compared to the other stamp you added after  above reply, it gives very much a yellowish impression.

Ditto what salmantino posted. Not to mention, my monitor is not color calibrated. When you're talking shades, any attempt can only be based on having the stamps together in the same picture with a color guide/reference and evenly dispersed natural lighting. Even then, we can only suggest relative the color guide.

That being said, the 50c #310(23Mar1903) actually comes in at least 2 flavors: orange and deep orange, both with same catalog value.

The 30c #38(1860), which is a major premium catalog value stamp by the way ($100++) comes in at least 3 flavors: orange, yellow orange, and reddish orange, all with same catalog value. [EDIT: See below 2 posts for correction to this paragraph.]

What you are probably looking at is a yellow orange 30c stamp and an orange or deep orange 50c, based on what I see on my uncalibrated monitor.

In addition, on some older US orange stamps, you have to deal with sulfur contamination (typically introduced by pollution/smoke) which will turn the surface orange component of the ink to an uneven (usually) brownish or blackish (when heavily contaminated). The much older 30c stamp appears to have very minor sulfur contamination, but not really noticeable unless you really nit-pick. The 50c stamp looks uncontaminated.