woocommerce/plugins/woocommerce-admin/client/tasks/reminder-bar/reminder-bar.scss

.woocommerce-layout__header-tasks-reminder-bar {
	height: 40px;
	background-color: #007cba;
	display: flex;
	justify-content: space-between;
	align-items: center;
	color: #fff;

	&::before {
		content: '';
	}

	button {
		&:hover {
			opacity: 0.7;
			color: inherit;
		}

		color: inherit;
	}

	a {
		color: inherit;
	}

	p {
		font-size: 13px;
	}
}