Hello
Thank you for your query.
You will need to use custom css to override the template color value for these. Please use the first css rule (body .sppb-btn.sppb-btn-primary::before) for the header menu button and the later for the slider button. "#0f4ae3" is the current color code - you have to change this.
body .sppb-btn.sppb-btn-primary::before {
background: linear-gradient(255.48deg, rgba(255, 255, 255, 0.2) 4.07%, rgba(255, 255, 255, 0) 103.07%), #0f4ae3;
}
.pitech-slider .sp-slider-btn-text::before {
background: linear-gradient(255.48deg, rgba(255, 255, 255, 0.2) 4.07%, rgba(255, 255, 255, 0) 103.07%), #0f4ae3;
}