woocommerce-paypal-payments/modules/ppcp-settings/resources/css/components/reusable-components/_button.scss

button.components-button, a.components-button {
	&.is-primary, &.is-secondary {
		&:not(:disabled) {
			background-color: $color-black;
		}

		&:disabled {
			color: $color-white;
		}

		border-radius: 2px;
		padding: 14px 17px;
		height: auto;
	}

	&.is-primary {
		@include font(13, 20, 400);

		&:not(:disabled) {
			background-color: $color-blueberry;
		}
	}

	&.is-secondary:not(:disabled) {
		border-color: $color-blueberry;
		background-color: $color-white;
		color: $color-blueberry;

		&:hover {
			background-color: $color-white;
			background: none;
		}
	}

	&.is-tertiary {
		color: $color-blueberry;

		&:hover {
			color: $color-gradient-dark;
		}

		&:focus:not(:disabled) {
			border: none;
			box-shadow: none;
		}
	}
}