You can control and overwrite the default color for messages by using the SCSS variables
// AKIOMA MESSAGES MODAL AND NON-MODAL $msg_success_color: #4BB543 !default; $msg_error_color: #e53935 !default; $msg_warning_color: #F57C00 !default; $msg_info_color: #3399cc !default; $msg_question_color: $msg_info_color !default; $msg_custom_color: $msg_info_color !default; // second level variables you can change individually // variables for modal box messages $modal_success_color: $msg_success_color !default; $modal_error_color: $msg_error_color !default; $modal_warning_color: $msg_warning_color !default; $modal_info_color: $msg_info_color !default; $modal_question_color: $msg_question_color !default; $modal_custom_color: $msg_custom_color !default; // variables for notification box messages $notification_success_color: $msg_success_color !default; $notification_error_color: $msg_error_color !default; $notification_warning_color: $msg_warning_color !default; $notification_info_color: $msg_info_color !default;