How technical do you want to get?
Phillips Hue uses a different color space than commonly used RGB / HEX.. One option is to get different bulbs (costing a lot less than Hue bulbs) that can take an RGB or HEX #.
I had a student worker build a custom controller. This is not the cheapest way to go about it. This was a great personal project for my student because he also got an introduction to coding and fabricating something. If you have kids you want to teach some coding to or like to tinker this works. Otherwise, I am not sure.
You could enter exact RGB values and then press the screen and the bulb would change to that color. It is based off of this example:
https://learn.adafruit.com/pyportal-philips-hue-lighting-controller?view=allI would bet there are python scripts or website out there that can do the conventions for you.
I did find something really close to official A&M Maroon, called Web Maroon.
Web Maroon RGB is (127,0,0), just slightly different than official A&M Maroon.
[XY] - Gamut A [0.7,0.2986]
[XY] - Gamut B [0.674,0.322]
[XY] - Gamut C [0.692,0.308]
Official A&M Maroon for display (not for physical printing - printing uses a different color space) is:
HEX 500000
RGB (80,0,0)