Are status category color codes defined anywhere in Jira system files?

Hi,
I was sent here by Atlassian Support: Does anyone know in which file (system file) Jira stores the category color codes for statuses? We need to change the color for the “In Progress” category back to yellow (became blue recently…). I hope there are just 2-3 color codes that I need to change somewhere (font color, background color, maybe also border color) but I can’t find it.
I’m aware that changing Jira system files is actually not supported and modifications need to be re-applied after a Jira update, but in this case I can live with it.
Thanks for your help, Tom

I used something like this in the Announcement Banner for now. However, please note that I went the opposite direction: I found the remaining Yellow Examples and instead turned them into the new colors – I just wanted it to be consistent. You can override the color codes with your own desired ones.

.aui-lozenge.jira-issue-status-lozenge-blue-gray {
    background-color: #5243AA;
    border-color: #5243AA;
    color: #FFFFFF;
}
.aui-lozenge.jira-issue-status-lozenge-yellow {
    background-color: #0052CC;
    border-color: #0052CC;
    color: #FFFFFF;
}
.aui-lozenge.aui-lozenge-subtle.jira-issue-status-lozenge-blue-gray {
    background-color: #EAE6FF;
    border-color: #EAE6FF;
    color: #403294;
}

.aui-lozenge.aui-lozenge-subtle.jira-issue-status-lozenge-yellow {
    background-color: #DEEBFF;
    border-color: #DEEBFF;
    color: #0747A6;
}
.aui-lozenge.jira-issue-status-lozenge-green {
    background-color: #00875A;
    border-color: #00875A;
    color: #FFFFFF;
}
.aui-lozenge.aui-lozenge-subtle.jira-issue-status-lozenge-green {
    background-color: #E3FCEF;
    border-color: #E3FCEF;
    color: #006644;
}