Style text

The Text composable has multiple optional parameters to style its content. Below, we’ve listed parameters that cover the most common use cases with text. For all the parameters of Text, see the Compose Text source code.

Whenever you set one of these parameters, you’re applying the style to the whole text value. If you need to apply multiple styles within the same line or paragraphs, see the section on multiple inline styles.

Common text stylings

The following sections describe common ways to style your text.

Change text color

@Composable
fun BlueText() {
    Text("Hello World", color = Color.Blue)
}
TextSnippets.kt

Change text size

@Composable
fun BigText() {
    Text("Hello World", fontSize = 30.sp)
}
TextSnippets.kt

Make text italic

Use the fontStyle parameter to italicize text (or set another FontStyle).

@Composable
fun ItalicText() {
    Text("Hello World", fontStyle = FontStyle.Italic)
}
TextSnippets.kt

Make text bold

Use the fontWeight parameter to bold text (or set another FontWeight).

@Composable
fun BoldText() {
    Text("Hello World", fontWeight = FontWeight.Bold)
}
TextSnippets.kt

Add shadow

The style parameter lets you set an object of type TextStyle and configure multiple parameters, for example shadow. Shadow receives a color for the shadow, the offset, or where it is located in respect of the Text and the blur radius which is how blurry it looks.

@Composable
fun TextShadow() {
    val offset = Offset(5.0f, 10.0f)
    Text(
        text = "Hello world!",
        style = TextStyle(
            fontSize = 24.sp,
            shadow = Shadow(
                color = Color.Blue, offset = offset, blurRadius = 3f
            )
        )
    )
}
TextSnippets.kt

Add multiple styles in text

To set different styles within the same Text composable, use an AnnotatedString, a string that can be annotated with styles of arbitrary annotations.

AnnotatedString is a data class containing:

• A Text value
• A List of SpanStyleRange, equivalent to inline styling with position range within the text value
• A List of ParagraphStyleRange, specifying text alignment, text direction, line height, and text indent styling

TextStyle is for use in the Text composable, whereas SpanStyle and ParagraphStyle is for use in AnnotatedString. For more information about multiple styles in a paragraph, see Add multiple styles in a paragraph.

AnnotatedString has a type-safe builder to make it easier to create: buildAnnotatedString.

@Composable
fun MultipleStylesInText() {
    Text(
        buildAnnotatedString {
            withStyle(style = SpanStyle(color = Color.Blue)) {
                append("H")
            }
            append("ello ")

            withStyle(style = SpanStyle(fontWeight = FontWeight.Bold, color = Color.Red)) {
                append("W")
            }
            append("orld")
        }
    )
}
TextSnippets.kt

Enable advanced styling with Brush

To enable more advanced text styling, you can use the Brush API with TextStyle and SpanStyle. In any place where you would typically use TextStyle or SpanStyle, you can now also use Brush.

Use a brush for text styling

Configure your text using a built-in brush within TextStyle. For example, you can configure a linearGradient brush to your text as follows:

val gradientColors = listOf(Cyan, LightBlue, Purple /*...*/)

Text(
    text = text,
    style = TextStyle(
        brush = Brush.linearGradient(
            colors = gradientColors
        )
    )
)
TextSnippets.kt

You are not limited to this particular color scheme or style of coloring. While we have provided a simple example to highlight, use any of the built-in brushes or even just a SolidColor to enhance your text.

Integrations

Since you can use Brush alongside both TextStyle and SpanStyle, integration with TextField and buildAnnotatedString is seamless.

For more information about using the brush API within a TextField, see Style input with Brush API.

Additional styling using SpanStyle

Apply a brush to a span of text

If you only want to apply a brush to parts of your text, use buildAnnotatedString and the SpanStyle API, along with your brush and gradient of choice.

Text(
    text = buildAnnotatedString {
        append("Do not allow people to dim your shine\n")
        withStyle(
            SpanStyle(
                brush = Brush.linearGradient(
                    colors = rainbowColors
                )
            )
        ) {
            append("because they are blinded.")
        }
        append("\nTell them to put some sunglasses on.")
    }
)
TextSnippets.kt

Opacity in a span of text

To adjust the opacity of a particular span of text, use SpanStyle's optional alpha parameter. Use the same brush for both parts of a text, and change the alpha parameter in the corresponding span. In the code sample, the first span of text displays at half opacity (alpha =.5f) while the second displays at full opacity (alpha = 1f).

val brush = Brush.linearGradient(colors = rainbowColors)

buildAnnotatedString {
    withStyle(
        SpanStyle(
            brush = brush, alpha = .5f
        )
    ) {
        append("Text in ")
    }
    withStyle(
        SpanStyle(
            brush = brush, alpha = 1f
        )
    ) {
        append("Compose ❤️")
    }
}
TextSnippets.kt

Additional resources

For additional customization examples, see the Brushing Up on Compose Text Coloring blog post. If you are interested in learning more about how Brush integrates with our Animations API, see Animating brush Text coloring in Compose.

Apply marquee effect to text

You can apply the basicMarquee modifier to any composable to produce an animated scrolling effect. The marquee effect occurs if the content is too wide to fit in the available constraints. By default, basicMarquee has certain configurations (such as velocity and initial delay) set, but you can modify these parameters to customize the effect.

The following snippet implements a basic marquee effect on a Text composable:

@Composable
fun BasicMarqueeSample() {
    // Marquee only animates when the content doesn't fit in the max width.
    Column(Modifier.width(400.dp)) {
        Text(
            "Learn about why it's great to use Jetpack Compose",
            modifier = Modifier.basicMarquee(),
            fontSize = 50.sp
        )
    }
}
TextSnippets.kt

Figure 6. The basicMarquee modifier applied to text.