PowerPoint Underline Color Different From Text Color: Setup

You want the underline beneath your text to be a different color than the text itself. PowerPoint does not offer a single button to set a separate underline color like word processors do. This article explains the only reliable method to achieve this effect using the shape and text fill approach. You will learn how to set up the underline color separately from the text color in a few steps.

Why PowerPoint Does Not Have a Separate Underline Color Setting

PowerPoint treats the underline as a font attribute that inherits the current text color. When you apply an underline to text, the line always uses the same color as the font. This behavior is consistent across all Office applications, but PowerPoint lacks the font dialog options found in Word that allow a separate underline color.

The root cause is that PowerPoint’s text engine does not expose an independent underline color property. The underline is rendered as part of the text glyph, not as a separate shape. To work around this limitation, you must use a visual trick that separates the underline from the text.

Two methods exist to achieve the effect. The first uses a colored shape behind the text to simulate a different underline color. The second uses a separate text box that contains only underline characters. Both methods give you full control over the underline color without changing the text color.

Method 1: Using a Colored Shape Behind the Text

This method works best when you want a single line of text with a different underline color. You place a narrow rectangle behind the text and set the text fill to transparent so the shape shows through only at the underline position.

Prerequisites

You need a slide with a text box that contains the text you want to underline. The text box must have a transparent background so the shape behind it is visible.

Steps to Set Up a Different Underline Color Using a Shape

1. Insert a rectangle shape
   Go to the Insert tab, click Shapes, and select Rectangle. Draw a narrow rectangle below the text where the underline should appear. The rectangle width should match the text width.
2. Format the rectangle color
   Right-click the rectangle and choose Format Shape. In the Fill section, select Solid Fill and choose the color you want for the underline. Set the Shape Outline to No Outline.
3. Position the rectangle under the text
   Drag the rectangle so its top edge touches the bottom of the text. Use the arrow keys for fine positioning. The rectangle should be directly under the text but not overlapping it.
4. Apply underline to the text
   Select the text box. On the Home tab, click the Underline button or press Ctrl+U. The underline will appear in the same color as the text.
5. Make the text fill transparent
   Select the text box. Right-click and choose Format Shape. In the Text Options pane, expand Text Fill and select No Fill. The text becomes invisible, but the underline remains visible. The colored rectangle behind the text now shows through at the underline position, creating the illusion of a different underline color.
6. Adjust text box background
   In the Format Shape pane, under Shape Options, set the Fill to No Fill and the Line to No Line. This ensures only the text and the rectangle are visible.
7. Group the elements
   Select both the text box and the rectangle. Right-click and choose Group > Group. This keeps them together if you move or resize the text.

After grouping, the underline color appears different from the text color. The text itself is transparent, but the underline from the text box remains visible. The colored rectangle behind the underline shows through because the text fill is removed.

Method 2: Using a Separate Text Box for the Underline

This method gives you more control over the underline style and thickness. You create a second text box that contains only underscore characters or a line drawn with the shape tool. This approach works well for multiple lines of text or when you need a thicker underline.

Steps to Set Up a Different Underline Color Using a Separate Text Box

1. Create the main text without underline
   Insert a text box and type your text. Do not apply any underline formatting to this text box. Set the text color to your desired color.
2. Create a second text box for the underline
   Insert another text box below the main text. Type a series of underscore characters equal to the length of the main text. For example, if your text is 10 characters, type ten underscores.
3. Change the underline text box color
   Select the underscore text box. On the Home tab, change the font color to the color you want for the underline. Adjust the font size to match the underline thickness you prefer.
4. Position the underline text box
   Drag the underscore text box so it sits directly under the main text. Use the Align tools on the Format tab to center or left-align the two text boxes as needed.
5. Remove the text box outline
   Select the underscore text box. Right-click and choose Format Shape. Set the Fill to No Fill and the Line to No Line. This hides the text box border.
6. Group the two text boxes
   Select both text boxes. Right-click and choose Group > Group. This keeps the underline aligned with the text when you move the group.

The underscore characters now appear in a different color from the main text. You can adjust the underscore font size to change the underline thickness. This method also works with dashed or dotted lines if you use the shape line tool instead of underscores.

Common Issues When Setting a Different Underline Color

The Underline Disappears After Setting Text Fill to No Fill

When you set the text fill to No Fill, the text becomes invisible. The underline remains visible because it is part of the text glyph. If the underline also disappears, check that the underline formatting was applied before you changed the text fill. Apply the underline first, then set the text fill to No Fill.

The Colored Rectangle Shows Through the Text Itself

If the rectangle extends above the underline position, it will color the text area. Make sure the rectangle is only as tall as the underline thickness. A rectangle height of 2 to 4 points is usually sufficient. Use the Format Shape pane to set the rectangle height precisely.

The Underscore Characters Do Not Match the Text Length

Variable-width fonts cause underscores to not align perfectly with the text above. Use a monospaced font like Courier New for the underscore text box. This ensures each underscore character has the same width as the characters in the main text.

Text Boxes Shift When Grouped

Grouping can move the underline text box slightly. Before grouping, use the Align > Align Left or Align Center options on the Format tab to lock the horizontal position. Then group the elements without moving them.

Item	Method 1: Shape Behind Text	Method 2: Separate Underline Text Box
Setup complexity	Requires text fill set to No Fill	Requires underscore character alignment
Underline thickness control	Controlled by rectangle height	Controlled by font size of underscore
Supports multiple lines	Difficult to align multiple rectangles	Easy with separate text boxes per line
Underline style options	Solid only	Solid, dashed, dotted using shape lines
Best for	Single line of text	Multiple lines or custom underline styles

PowerPoint does not provide a native setting for a different underline color. The shape and separate text box methods are reliable workarounds. Use Method 1 for a quick single-line effect. Use Method 2 for complex layouts or when you need dashed or dotted underlines. After setting up the underline, group the elements to keep the design intact during slide editing. You can also save the grouped elements as a reusable slide element using the Format Painter or by copying the group to a slide master.