You my friend, are about to be introduced to the wonderful world of css in conventional apps. ...

Um, no. Whatever issues Gtk3 brought have been fixed and there is nothing for wxPerl/wxWidgets users to do :) #14759 (Unable to set background colour for most controls with gtk3) – wxWidgets

some wxListBox implementations allow setting bg/fg colors/colours , most don't allow setting colours, it depends on the platform ... if you want colors/colour you don't want wxListBox

wxListCtrl allows setting colors/colour on every platform, but you can't customize the headers/headings

wxGrid allows full customization (colour/fonts) of everything headers/items on every platform

I provided these links for OP before, but OP is too tired to type :/
See also wxperl_usage / wxperl-usage / wxPerl::Usage / Class Method Browser , available methods, method invocation syntax, link to docs for some listctrl helpers, they start with "sub Wx::ListCtrl::", and sub Wx::ListCtrl::AddStringItems
Re: wxGridTable how is the grid filled in
Wx::Perl::ListView/Wx::Perl::ListView::SimpleModel
https://metacpan.org/source/MBARBON/Wx-Perl-ListView-0.01/example/listview.pl
Re: Wx::Perl: How to change/set font and size of Wx::ListCtrl column headings?

In reply to Re^2: How do i color font in a listbox? by Anonymous Monk
in thread How do i color font in a listbox? (Solved!!!) by james28909

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.