(an extrapolation on this, previously)
so I'll take the seven established colors that made it into the new editor and using the paint bucket icon, put each of them on one line.
Also I'll open Web Developer Tools in Firefox and temporarily reduce the size of the text in the html editor so this is a bit more parseable.
And I'll also insert linebreaks after the various html elements even though it'll constantly remove them when I switch between editor and preview >:(
naturally typing in the new editor/preview tab on html editor (same thing) will create all the <p>s and <br>s back in the html as you type ("paragraph" and "line break" respectively).
one (red) two (orange) three (green) four (blue) five (yellow) six (pink) seven (purple)
in html editor we see that only some of them remain 2018's sitcom reference classes, and some are <span>s with style="color:" declarations instead.
therefore, we've learned we can select our own hex colors. here's the table of colors that kinda look like six letter words I used at the end of the last post.
so we can do pure rgb red FF0000, and we can do pure rgb green 00FF00, and pure rgb blue 0000FF, and this particular blue-green I like 236b8e, and fab1ed, and 0b5e55. among other choices.
some platforms/programs let you stick a fourth pair of numbers on the end of your hex color to signify alpha (transparency). it doesn't look like tumblr lets you do this and in fact when you even try it strips the entire style declaration <span> and converts the code back in the html editor to its text in a <p> instead. It also doesn't care for rgba(r,g,b,a) apparently. I did go as far as to search out the design docs for the "neue post format" but all I got from there was "you can use a base-level six character hex code", essentially.