from the wordpress admin panel. In an entry using the "html" tab I have the css code like this.
<h3 style="text-align: center;color: #4517c6;">3. Reconciliación</h3>
and it does not take the color, the h3 does not appear directly. I have updated the post to save the changes, on a test page the css code works for me, it centers the h3 and gives it the blue color but it does not work on the blog.
If the preview is correct in the editor and then it is not seen in the blog, it is almost certain that the problem is in the CSS. You may have a class that overlays the style.
Do the following. On the blog, click the right mouse button and then view source code. Look for word 3. Reconciliation .
If it does appear, you have a problem with the CSS styles. In the event that it does not appear, it is most likely that you are not viewing the page you are editing.
Styles can be forced in css. You can also try the following.
<h3 style="text-align: center;color: #4517c6 !important;">3. Reconciliación</h3>