Hello Michael

Thanks for posting in the Lucidchart Community! Yes this is possible! If you drag a shape to your canvas you can choose what color you would like it to be by selecting the paint bucket icon and opening the custom color menu (+). You will also be able to adjust the opacity there. To color the text click on the "A" icon with the bold underline and choose what color you would like the text to be. If you want the text to appear darker you can bold it. I have attached some screenshots for reference! Here is an article that explains how to modify and format shapes.