conversation: Displayed color font is not homogeneous

Describe your environment

Jami on desktop :

• OS: Ubuntu 22.04 LTS
• Jami version: Világfa 202305231354
• What build you are using: I don't know

Additional information

• Can you reproduce the bug : at will

Kazam_screencast_00013

It seems that it's only the case for "Outgoing call".

added good first issue typebug ui/ux labels

Actually it's because the background-color is different and

bool
UtilsAdapter::luma(const QColor& color) const
{
    return (0.2126 * color.red() + 0.7152 * color.green() + 0.0722 * color.blue())
           < 153 /* .6 * 256 */;
}

may return a different value for some colors.

assigned to @sblin

added sprintto review label

closed

removed sprintto review label

mentioned in commit fa8fcd87