1) What is your original issue/pain point you want to solve?
https://webaim.org/articles/contrast/
2) Which are one or two concrete situations where this problem hurts the most?
Overview listings, breadcrumbs, and icons.
There are currently a lot of cases where the contrast on text/icons against the background is too low.
3) Why is it not solvable with the Zammad standard?
Because the css is incorrect at its core
4) What is your expectation/what do you want to achieve?
Updating some of the color variables, and setting a few small css tweaks should help.
:root {
// Replacements
--text-link: #2F6FA7;
--menu-icon: #BDBDBD;
--button-primary-background: #257BB1;
--text-muted: #6F7476;
--interactive-muted: #686C6E;
--button-action-color: #686C6E;
--text-nav: #2F6FA7;
--menu-icon-secondary: #9495A4;
--ok-color: #9E6C00;
--supergood-color: #2A834F;
--danger-color: #e01f1f;
--header-secondary: #6B6B6B;
--border-alt: #6B6B6B;
}
.item--low-priority a {
font-style: italic;
color: var(--text-link);
}
#global-search {
border: 1px solid;
}
.tabsSidebar-tab .icon {
fill: var(--interactive-muted-alt-selected);
}
.tabsSidebar-tab.active .icon {
fill: var(--ok-color);
}
.item--high-priority a {
color: --danger-color;
}
div.box .form-control {
border-color: var(--border-alt);
}