> For the complete documentation index, see [llms.txt](https://docs.thunkable.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thunkable.com/blocks/blocks/color.md).
# Color Blocks
## Overview
Color blocks enable you to specify and manipulate colors used within your app's interface. You can use these blocks to choose and apply colors to elements like backgrounds, text, buttons, or other visual components.
## Color Palette
Clicking a color block opens the standard color palette to select from.
## Random Color
This block returns a random color with an Alpha value of 100%.
## Set RGB Color
This block allows you to define a color using [RGB values](https://www.w3schools.com/colors/colors_rgb.asp).
## Set HSV Color
This block allows you to define a color using [HSV values](https://en.wikipedia.org/wiki/HSL_and_HSV).
## Blend Colors
This block allows you to define a color by blending two colors with a selected ratio of color 1 to color 2.
## Set RGBA Color
You can use a [text block](/blocks/blocks/text.md) to define a color with [RGBA syntax](https://www.w3schools.com/css/css_colors_rgb.asp) `rgba(r,g,b,a)`.
## Set Hex Color
You can use a [text block](/blocks/blocks/text.md) to define a color with [hex values](https://htmlcolorcodes.com/).
