header color in dark mode

You seem to be using the Kadence theme in a Pro version. Because in the Pro version there is the Darkmode you use. You can find the instructions here: https://www.kadencewp.com/kadence-theme/knowledge-base/pro-addon/how-to-use-the-color-palette-switch-dark-mode/

Since you are using a commercial product I would ask you to contact the support of the theme: https://www.kadencewp.com/premium-support-tickets/ – Questions about commercial products are not allowed here in the forum.

Hello @alekz77,

You can try override this css:

html.darklooks-mode-changer-enabled :not(.dl-dark-neglect):not(.floating-mode-switcher-wrap):not(.dl-switch):not(textarea):not(input):not(select):not(option):not(button):not(pre):not(.dl-switch span):not(rect):not(ins):not(mark):not(code):not(img):not(progress):not(iframe):not(.mejs-iframe-overlay):not(.woosc-area):not(.woosc-inner):not(svg):not(canvas):not(video):not(a):not(path):not(.elementor-element-overlay):not(.elementor-background-overlay):not(i):not(button *):not(a *) {
    background-color: #F6DCA1 !important;
}