I’m new to graphic design and am unsure of how to manage colours in a logo I’ve just created. It’s black text (converted to paths) with one small graphical element (a leaf). I created it in Inkscape using default/darkest black (000000ff) for the text and a green with RGBA value of 556b2fff (“dark olive green”) for the leaf. Inkscape shows the CMYK value as being 21, 0, 56, 58, which matches what I see on conversion sites like rgb.to and encycolorpedia.
But I’ve read that to create an actual CMYK file to send to the client, I need to import my Inkscape SVG file into Scribus, and edit the colour and export as an editable PDF. When I select and edit the green, the ‘new’ colour Scribus suggests (which looks very close to the original) has CMYK values of 57.25%, 25.88%, 84.71%, 40.39%. If I change the values to the corresponding values given on rgb.to/encycolorpedia (21, 0, 56, 58), it shows a colour more different to the original colour. (I’m using the HSV Color Map option - is that a “colour profile”? - as suggested in a video and a text guide on using Scribus.)
I’m very confused and am not sure if I’m allowed to ask multiple sub-questions here - please let me know if I’m violating rules/etiquette! Otherwise:
- Why would the CMYK values in Scribus be so different from the conversion chart values?
- Which should I use - the ‘true’ values (if they are indeed true) from the conversion charts, or the Scribus-generated ones which look closer?
- Is there any issue with having CMYK values which have decimal places, like the Scribus-gen’ed ones? I.e. is it better/more normal to have whole-number values, in basic logo design at least?
- Are the CMYK values of 21, 0, 56, 58 more cost-effective, because there’s no magenta being used? I.e. does this reduce the colour count, from a printer’s point of view?
And re. black:
- I’ve been advised on Reddit to create both a flat black and rich black variants of the logo; should I use Scribus to create a rich black version, inputting 0, 40, 0, 100 for the black value there? [Edit: Or some other common rich black value set, if the answer to q. 4. is yes!]
Designers on Reddit have advised I should also specify a Pantone colour for the green leaf - the first website I used for a rough conversion guide gave 371 C as a very close match (up to 16 colour distance), and the second gave 371.
- Do I specify the C in the style guide, or does each printer decide whether to use C or U depending on the paper?
- Would it be better practice for me to just get the exact corresponding CMYK and RGB values for PMS 371 and use those in the logo (and do it that way for future work)?
Thanks in advance for your help! I’ve been browsing a lot of articles here this week whilst trying to learn how to create a (good-quality) logo in Inkscape; I appreciate the time you all put into your answers.