If the checkboxes are an active user interactive (UI) component, they are required to reach a color contrast ratio of at least 3:1 against adjacent colors. If there is visual information on a page used to identify user interactive components, they must also have a 3:1 contrast ratio against adjacent colors. This visual information used to identify a UI component can be an input border, button shape/outline, etc.
Exception: Ignore components in the
disabled state and components with contrasting indicators.