Set default button styles for GenerateBlocks

functions.php

<?php
/* 
 * set GenerateBlocks button defaults
 * 
 * @url https://github.com/tomusborne/generateblocks/blob/c2aad72f6868001c6f7fa9b606cafef511eebd1b/includes/defaults.php#L231-L243
 */
add_filter("generateblocks_defaults", function ($defaults) {
  $color_settings = wp_parse_args(
    get_option("generate_settings", []),
    generate_get_color_defaults()
  );

  $defaults["button"]["backgroundColor"] =
    $color_settings["form_button_background_color"];
  $defaults["button"]["backgroundColorHover"] =
    $color_settings["form_button_background_color_hover"];
  $defaults["button"]["textColor"] = $color_settings["form_button_text_color"];
  $defaults["button"]["textColorHover"] =
    $color_settings["form_button_text_color_hover"];
  $defaults["button"]["paddingTop"] = "5";
  $defaults["button"]["paddingRight"] = "10";
  $defaults["button"]["paddingBottom"] = "5";
  $defaults["button"]["paddingLeft"] = "10";
  $defaults["button"]["borderColor"] =
    $color_settings["form_button_background_color_hover"];
  $defaults["button"]["borderColorHover"] =
    $color_settings["form_button_background_color_hover"];
  $defaults["button"]["borderSizeTop"] = "1";
  $defaults["button"]["borderSizeRight"] = "1";
  $defaults["button"]["borderSizeBottom"] = "1";
  $defaults["button"]["borderSizeLeft"] = "1";
  $defaults["button"]["borderRadiusTopRight"] = "0.5";
  $defaults["button"]["borderRadiusBottomRight"] = "0.5";
  $defaults["button"]["borderRadiusBottomLeft"] = "0.5";
  $defaults["button"]["borderRadiusTopLeft"] = "0.5";
  $defaults["button"]["borderRadiusUnit"] = "em";

  return $defaults;
});