Hi Vinitha,
Actually we were trying to apply both cell customization and row customization in the same row of the Grid component. We resolved this issue by overriding the CSS in material.scss like this.
td.e-active {
background: $grid-row-selection-bg-color;
color: $grid-row-selection-color;
border-width: 1px 0 0 1px !important;
border-color: #e0e0e0 !important;
}
Please find the below screenshot, Before row selection and After Row selection.
Once again thank you for your support.