Read More Button

Under generated post content section, how can I change the appearance of the %%item_read_more_button%% I would like to change the color as well as the hover color for it. <div class="pn-shadow-host js-pn-js-pn-create-project-modal" style="all: initial !important;"></div> <div class="pn-shadow-host js-pn-feedback-modal" style="all: initial !important;"></div> <div class="pn-shadow-host js-pn-image-modal" style="all: initial !important;"></div>