"trying to re-create a new logo"... usually is done in reverse of what you are doing RGB-to-CMYK. In reality, a new logo consists of branding and establishing a brand identity. Maybe I am getting ahead of myself. Typically, your logo would start with "spot color(s)". Pantone for instance. As Monika has suggested, you would ( or I would ) refer to a Pantone Solid-to-Process print guide book. Your color on my monitor looks like a Pantone 357C to me. Given that, my eyes are different than yours. Add to that my monitor is different than yours. But lets just say your client likes what I have come up with ( 357C ). In Illustrator, you apply that color to your artwork for the print file because now you have an established and approved color. What a lot of designers ad web designers over look is this standard approach to logo design. Logo design is not or should not involve RGB or CMYK color as a first step. I used Photoshop's Color Picker to find, under my Color Settings, the color values consisted of 51R - 102G - 51B, 95C - 31M - 100Y - 20K, and HEX @ 336633. So, all of these numbers originate from the established Pantone 357C. The purpose of starting with the spot color is consistency. The print vendors, sign makers, etc., all will refer to the original 357C. My only advice is if you like a particular RGB as seen on your screen, use Photoshop's Color Picker to find the closest Pantone color. Photoshop will also give you the CMYK and HEX color info, but be forwarned, the visual representation of color on your monitor will not be an accurate representation of the actual color. As Monika has suggested, the best way to determine a color is a reflective color from a printed color swatchbook ( i.e., Pantone swatchbook ).
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