@wiris/mathtype-ckeditor5/dist/index-editor.css

MathType Web for CKEditor5 editor

.ck-widget.ck-math-widget.ck-suggestion-marker{
  border:none;
}
.ck-widget.ck-math-widget.ck-suggestion-marker.ck-suggestion-marker-insertion .Wirisformula{
      border:3px solid var(--ck-color-suggestion-marker-insertion-border);
    }
.ck-widget.ck-math-widget.ck-suggestion-marker.ck-suggestion-marker-insertion.ck-suggestion-marker--active .Wirisformula{
        border:3px solid var(--ck-color-suggestion-marker-insertion-border-active);
      }
.ck-widget.ck-math-widget.ck-suggestion-marker.ck-suggestion-marker-deletion .Wirisformula{
      border:3px solid var(--ck-color-suggestion-marker-deletion-border);
    }
.ck-widget.ck-math-widget.ck-suggestion-marker.ck-suggestion-marker-deletion.ck-suggestion-marker--active .Wirisformula{
        border:3px solid var(--ck-color-suggestion-marker-deletion-border-active);
      }