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copied!<p>Using <a href="http://docs.oracle.com/javase/tutorial/uiswing/components/tabbedpane.html#eg" rel="noreferrer"><code>TabComponentsDemo</code></a> as an example, <code>setBackgroundAt()</code> seems to work: </p> <pre><code>private void initTabComponent(int i) { pane.setTabComponentAt(i, new ButtonTabComponent(pane)); pane.setBackgroundAt(i, Color.getHSBColor((float)i/tabNumber, 1, 1)); } </code></pre> <p>Addendum: As @camickr helpfully observed, the target component must be <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html#props" rel="noreferrer">opaque</a>.</p> <p><img src="https://i.stack.imgur.com/sNVWR.png" alt="TabColors"></p> <pre><code>import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTabbedPane; /** @see http://stackoverflow.com/questions/8752037 */ public class TabColors extends JPanel { private static final int MAX = 5; private final JTabbedPane pane = new JTabbedPane(); public TabColors() { for (int i = 0; i < MAX; i++) { Color color = Color.getHSBColor((float) i / MAX, 1, 1); pane.add("Tab " + String.valueOf(i), new TabContent(i, color)); pane.setBackgroundAt(i, color); } this.add(pane); } private static class TabContent extends JPanel { private TabContent(int i, Color color) { setOpaque(true); setBackground(color); add(new JLabel("Tab content " + String.valueOf(i))); } @Override public Dimension getPreferredSize() { return new Dimension(320, 240); } } private void display() { JFrame f = new JFrame("TabColors"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new TabColors().display(); } }); } } </code></pre>

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