Here is an additional site to look at to help with HSV colors. To view HSV values click the down arrow (next to RGB) and select HSB. The site can help understand colors. No account or sign-up required.
https://kuler.adobe.com/create/color-wheel/
That’s a nice find! One challenge I see is that it’s using 360 for max hue, and 100 for saturation and value (vs. the 255 used by FastLED for all three). I wonder if a straight conversion would result in the desired colors? It sounds like some experimenting may be in order tonight. 
From what I read the values 0 to 360 are mapped to 0 to 255 for programming. @Mark_Kriegsman , @Daniel_Garcia please comment.
Help is on the way, later this evening.
I finally made a color chart showing spectra and rainbow hue mappings.
(Rainbow is what FastLED uses automatically.)
The typical “360” thing is spectral, not rainbow. Anyway, the chart should help and I can post it in a couple of hours.