- OPTION 1 : Change the Color at least for CMYK projects
- OPTION 2 : see Option 1.
I don't mean to be glib. The reality is if you have an RGB color which falls outside the CMYK gamut and can not be reproduced as CMYK, then there's no method to force the color into the CMYK gamut. You ultimately must alter the color.
You may be able to find a Pantone or Spot color which more closely matches your RGB color. That 110,81,255 is borderline fluorescent. Pantone does have some fluorescent inks or at least more vibrant purples than CMYK may produce. Spot colors can be used in commercial printing in addition to CMYK. The use of a spot color may increase printing costs at times.
It is not uncommon for a company to have 3 color breakouts for branding -- RGB, Spot, CMYK -- each breakout is specifically chosen to accommodate the color mode of the output. And slight shifting may be present between the different color specifications.
One universal truth is that not all RGB colors can be reproduced as ink on paper. The light spectrum is simply much broader than other spectrums. There's no getting around that.
I typically start all brand color decisions in Pantone (avoiding fluorescents and metallics) or CMYK due to this very fact. It's far too easy to settle on a color in RGB only to discover it can't be reproduced as CMYK or Spot. If you start color choices in Spot/CMYK you can be assured that any CMYK color can be very closely matched in RGB. Most spot colors as well.