CSS Classes for the FlexChart control are as follows:

Class	Description
Core
.wj-flexchart	Styles the div host element of the FlexChart control.
.wj-header .wj-title	Styles the header element of the FlexChart control.
.wj-footer .wj-title	Styles the footer element of the FlexChart control.
.wj-data-label	Styles all the data label entries of the FlexChart control.
.wj-labels	Styles all the label elements that represents text in the FlexChart control including data labels, legend labels and axis labels.
.wj-data-label-border	Styles the data label border.
.wj-data-label-line	Styles the data label line.
.wj-axis-x .wj-line	Styles the x-axis line, which is displayed when the AxisLine property is set to true.
.wj-axis-y .wj-line	Styles the y-axis line, which is displayed when the AxisLine property is set to true.
wj-plot-area	Styles the rectangle plot area where the chart is rendered.
wj-series-group	Styles the area that is used to plot the series data in the FlexChart control.
wj-gridline	Styles the major gridlines, which is displayed when the MajorGrid property is set to true.
wj-gridline-minor	Styles the minor gridlines, which is displayed when the MinorGrid property is set to true.
.wj-tick	Styles the major tickmarks, which is displayed when the MajorTickMarks property is set to true.
.wj-tick-minor	Styles the minor tickmarks, which is displayed when the MinorTickMarks property is set to true.
.wj-flexchart .wj-state-selected	Styles the selected items in the FlexChart control.
Interaction
.wj-chart-linemarker	Styles the line marker element of the FlexChart control.
.wj-chart-linemarker-hline	Styles the horizontal line marker.
.wj-chart-linemarker-vline	Styles the vertical line marker.
wj-chart-linemarker-container	Styles the div host element that includes the line marker container.
.wj-chart-linemarker-draggable	Styles the cursor that appears while dragging the the line marker.
.wj-chart-rangeslider	Styles the range slider added to the FlexChart control.
.wj-rangeslider-content	Styles the content area assigned to the range slider that displays the current value.
.wj-rangeslider-rangehandle	Styles the distance area between range slider min handle and range slider max handle.
.wj-rangeslider-minhandle	Styles the min handler of the range slider.
.wj-rangeslider-maxhandle	Styles the max handler of the range slider.
.wj-rangeslider-handle-active	Styles the currently selected min or max  range slider handler.
.wj-glyph-left	Styles the left-arrow icon displayed in the range slider.
.wj-glyph-right	Styles the right-arrow icon displayed in the range slider.
.wj-glyph-down	Styles the down-arrow icon displayed in the range slider.
.wj-glyph-up	Styles the up-arrow icon displayed in the range slider.
.wj-chart-hrangeslider	Styles the horizontal range slider added to the FlexChart control.
.wj-chart-vrangeslider	Styles the vertical range slider added to the FlexChart control.
.wj-chart-rangeselector-container	Styles the div host element that includes the range selector container.
.wj-panable	Styles the cursor that appears while performing the panning operation on the FlexChart control.
.wj-zoom-overlay	Styles the highlighting zooming area on the chart.