https://community.gravityforms.com/t/orbital-theme-css-variables-selector-specificity/19681

styles.css

/// Gravity Forms OVERRIDES
//// Modify variables
body:has(#gravity_forms_theme_framework-css) .gform-theme--framework.gform-theme--orbital {
  --gf-color-danger:#c02b0a;
    --gf-color-primary: var(--primary);
  /* Button Color and Hover color */
    --gf-ctrl-btn-bg-color-primary:var(--primary);
    --gf-ctrl-btn-bg-color-hover-primary:var(--primary-medium);
    --gf-ctrl-border-color: var(--border-color-light);  
  /* Input field Radii */
   --gf-ctrl-radius: var(--btn-radius);
  /* Input Field Border width */
  --gf-ctrl-border-width: var(--border-width);
  /* Submit Button Radius */
 --gf-ctrl-btn-radius: var(--radius-circle);
  /* Submit Button Color */
  --gf-ctrl-btn-color-primary:var(--text-dark);
  /* Text Area Radius */
  --gf-ctrl-textarea-radius:var(--radius);
}