Thanks for looking into it, the css works for now :)
Shortcode pasted to the pastebin below.

Thanks for the feedback, Ismael.
I think I didn’t communicate the problem very well, though. I want the small arrow on both color sections, but when I edit both sections to display the arrow, an arrow just above the last color section appears. I.e. the last color section displays an arrow both above and below. Check out the link in the private data and go down to the last color section to see what i mean :)