Callout
A tinted panel that groups other blocks together, for a highlighted tip or status.
callout wraps a list of child blocks in a rounded, tinted panel. Use it to draw attention to a tip,
a summary, or a status message that’s more than a single line of text.
Fields
PropType
typestring
Always `callout`.
Type
stringbackground_color?"green" | "blue" | "red" | "yellow" | "purple" | "gray" | "grey"
The panel's tint. `green` and `blue` are measured against Slack's Block Kit Builder; the rest are extrapolated to the same pastel style. An unrecognized or omitted value falls back to `gray`.
Type
"green" | "blue" | "red" | "yellow" | "purple" | "gray" | "grey"Default
"gray"child_blocksBlock[]
Blocks rendered inside the panel: rich text, sections, dividers, images, and contact cards.
Type
Block[]Examples
Every child block type
The preview above nests rich text, a divider, a section, and an image inside a callout.
Each background color
Your AppAPP
Green callout.
Your AppAPP
Blue callout.
Your AppAPP
Red callout.
Your AppAPP
Yellow callout.
Your AppAPP
Purple callout.