---
name: "SDL_SetSurfaceColorMod"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_SetSurfaceColorMod"
---

# SDL\_SetSurfaceColorMod(3)

Set an additional color value multiplied into blit operations.

## NAME

SDL\_SetSurfaceColorMod - Set an additional color value multiplied into blit operations.

## HEADER FILE

Defined in SDL3/SDL\_surface.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**bool SDL\_SetSurfaceColorMod(SDL\_Surface \*surface, Uint8 r, Uint8 g, Uint8 b);**

## DESCRIPTION

When this surface is blitted, during the blit operation each source color channel is modulated by the appropriate color value according to the following formula: **srcC**=**srcC**\***(color**/**255)**

## FUNCTION PARAMETERS

- *surface*

  the  **SDL\_Surface**\
    structure to update.

- *r*

  the red color value multiplied into blit operations.

- *g*

  the green color value multiplied into blit operations.

- *b*

  the blue color value multiplied into blit operations.

## RETURN VALUE

Returns true on success or false on failure; call

**SDL\_GetError** () for more information.

## THREAD SAFETY

This function is not thread safe.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_GetSurfaceColorMod**(3)](/SDL_GetSurfaceColorMod/3.md), **•**(3), [**SDL\_SetSurfaceAlphaMod**(3)](/SDL_SetSurfaceAlphaMod/3.md)