dots/usr/share/themes/Dracula/gtk-3.0/widgets/infobar.css

/***********
 * infobar *
 ***********/
GtkInfoBar {
    border-width: 0px;
    border-style: none;
}

.info {
    border: none;
    background-color: shade(@info_bg_color,0.9);
    background-image: none;
    color: @info_fg_color;
}

.error .button {
    border: none;
    color: @info_fg_color;
    background-image: none;
    background-color: @info_bg_color;
}

.error .button:hover {
    color: @info_fg_color;
    background-image: none;
    background-color: shade(@info_bg_color,1.1);
}

.error .button:active {
    color: @info_fg_color;
    background-image: none;
    background-color: shade(@info_bg_color,1.2);
}

.warning {
    background-color: shade(@warning_bg_color, 0.9);
    background-image: none;
    color: @warning_fg_color;
}

.warning .button {
    border: none;
    color: @warning_fg_color;
    background-image: none;
    background-color: @warning_bg_color;
}

.warning .button:hover {
    color: @question_fg_color;
    background-image: none;
    background-color: shade(@warning_bg_color,1.1);
}

.warning .button:active {
    color: @question_fg_color;
    background-image: none;
    background-color: shade(@warning_bg_color,1.2);
}

.question {
    background-color: shade(@question_bg_color, 0.9);
    background-image: none;
    color: @question_fg_color;
}

.question .button {
    border: none;
    color: @question_fg_color;
    background-image: none;
    background-color: @question_bg_color;
}

.question .button:hover {
    color: @question_fg_color;
    background-image: none;
    background-color: shade(@question_bg_color,1.1);
}

.question .button:active {
    color: @question_fg_color;
    background-image: none;
    background-color: shade(@question_bg_color,1.2);
}

.error {
    background-color: shade(@error_bg_color, 0.9);
    background-image: none;
    color: @error_fg_color;
}

.error .button {
    border: none;
    color: @error_fg_color;
    background-image: none;
    background-color: @error_bg_color;
}

.error .button:hover {
    color: @error_fg_color;
    background-image: none;
    background-color: shade(@error_bg_color,1.1);
}

.error .button:active {
    color: @error_fg_color;
    background-image: none;
    background-color: shade(@error_bg_color,1.2);
}