SMART datagrid v.1 > Classes > GridBase
Remove all column style sets registered in the grid to set through styleName of column.
// Remove the existing column styles,
grid.clearColumnStyles();
// and register again.
grid.registerColumnStyls({
yellow: {
background: '#ff0',
color: '#333'
},
red: {
background: '#f00',
color: '#fff'
}
]);