Budibase uses the Spectrum design system by Adobe. Included are four base themes; Lightest, Light, Dark, and Darkest.
If you are not satisfied with the base themes you can customize the options below:
Primary colour - used for the action variant on buttons, form fields (icons, checkboxes, radios, borders, and date pickers), icon colours, etc.
Primary color (hover) - like the previous one but when the element is hovered.
Navigation bar background color: the background color of your navigation bar. This also includes the drawer menu when on mobile.
Navigation bar text color - the text color of your navigation bar.