Add this code to the Custom CSS field on the Appearance tab of your Countdown Timer widget’s settings:
/* Counter background */
.eapps-countdown-timer-item-value {
background-color: violet!important;
}
/* Text */
.eapps-countdown-timer-header-title-text {
color: green!important;
}
/* Time lamels */
.eapps-countdown-timer-item-group-label {
color: blue!important;
}
/* Close button */
.eapps-countdown-timer-bar-close {
color: red!important;
}
/* Background */
.eapps-countdown-timer {
background: pink!important;
}
/* Numbers in counter */
.eapps-countdown-timer-item-value * {
color: yellow !important;
}
/* Button background */
.eapps-countdown-timer-button {
background-color: yellow;
}