Derkach Dmytro I tried the following code variants, but I couldn't get the black color on a dark background.
/* 1. Try changing the filter for the main container. This is the most likely place. */
body#crm-app.custom-body {
filter: contrast(4.81) !important; /* Set the value that makes the text white */
/* You may also need an additional brightness filter if this doesn't work on its own */
/* filter: contrast(4.81) brightness(1.2) !important; */
}
/* 2. Just in case, also repeat the rules for text color,
if changing the filter is not enough or if some elements still remain black.
This is an important step because the filter changes the visual appearance, but not the actual color. */
#crm-app.custom-body span,
#crm-app.custom-body a,
#crm-app.custom-body p,
#crm-app.custom-body h1,
#crm-app.custom-body h2,
#crm-app.custom-body h3,
#crm-app.custom-body h4,
#crm-app.custom-body h5,
#crm-app.custom-body h6,
#crm-app.custom-body li,
#crm-app.custom-body div {
color: #FFFFFF !important; /* Force white color */
}
/* 3. Specific element "Alexei Velegura" */
#crm-app.custom-body a.text-wrap.js-tooltip-contact-item {
color: #FFFFFF !important;
}
/* Specific element "25 May, 10:25" */
#crm-app.custom-body small.date-time-item {
color: #FFFFFF !important;
}
/* Specific element "PROCESS WORKING DESCRIPTION..." */
#crm-app.custom-body .js-stage-item.selected {
color: #FFFFFF !important;
}