CSS to customize the color for the up and down arrow and ring of the survey :
.surveysparrow-survey-container--classic-form
.ss-classic-footer--old .ss_classic_footer_right_content_wrap .ss_classic_form_navigator a {
border-color: red !important;
}
.surveysparrow-survey-container--classic-form .ss-classic-footer--old .ss_classic_footer_right_content_wrap .ss_classic_form_navigator a svg path {
stroke: red !important;
}
