When I try to create a layer control in my leaflet map the check mark is white and I cannot see it. Whatever I click on turns white instead of black. When I do OverlayGroups instead of BaseGroups it is hard to tell what is clicked on and what isn't. Does anyone know how to fix that? Below is my code.
overlayGroups = c('Equity Index', 'Bachelors Degree or Higher',
'Poverty', 'Life Expectancy',
'Physical Inactivity', 'Diabetes', 'Obesity', 'Disability'),
options = layersControlOptions(collapsed = FALSE)