Change the color of the long blue rectangle to Turquoise, Accent 1, Lighter 40% (5th column, 4th row in the Theme Colors palette)

To change the color of the long blue rectangle to Turquoise, Accent 1, Lighter 40% (5th column, 4th row in the Theme Colors palette), follow these steps:

1. Select the blue rectangle you want to change the color of.
2. Go to the "Home" tab in the Microsoft Office ribbon.
3. Locate the "Shape Fill" option in the "Drawing" section of the ribbon.
4. Click on the small arrow icon next to "Shape Fill" to open the dropdown menu.
5. In the dropdown menu, navigate to the "Theme Colors" section.
6. Click on the "More Colors" option in the bottom right corner of the dropdown menu.
7. In the "Colors" dialog box that appears, click on the "Standard" tab.
8. Scroll down to the 5th column and 4th row in the color palette.
9. Click on the color that represents Turquoise, Accent 1, Lighter 40%.
10. Click the "OK" button to apply the selected color to the blue rectangle.

The long blue rectangle should now be changed to Turquoise, Accent 1, Lighter 40%. Note that the exact appearance may vary depending on your version of Microsoft Office and the specific Theme Colors of your document.