All ovens are different, especially home ovens. I’ve found that 450° F/230° C (as stated in most sourdough recipes) is too low of a temperature for my oven to make good bread. I bake my bread at 500° F/260° C for the first 15 minutes, then at 475° F/250° C for the remaining 35 minutes. If your bread looks pale or isn’t as crispy as you’d like, try experimenting with a higher baking temperature.