CharFormat how set backgroud color ??

[Pablik]

hi i use QTextEdit and i want change background color on single char, i know char color can change with change

QTextChaFormat::setTextOutline(QPen(QColor::Color))

QTextChaFormat::setTextOutline(QPen(QColor::Color))

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Underline color can change

QTextChaFormat::setUnderlineColor,

QTextChaFormat::setUnderlineColor,

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but i can't finde background color.