# Custom data types and enumerations with RDS for PostgreSQL
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PostgreSQL supports creating custom data types and working with enumerations. For more information about creating and working with enumerations and other data types, see [Enumerated types](https://www.postgresql.org/docs/14/datatype-enum.html) in the PostgreSQL documentation. 

The following is an example of creating a type as an enumeration and then inserting values into a table. 

```
CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple');
CREATE TYPE
CREATE TABLE t1 (colors rainbow);
CREATE TABLE
INSERT INTO t1 VALUES ('red'), ( 'orange');
INSERT 0 2
SELECT * from t1;
colors
--------
red
orange
(2 rows)
postgres=> ALTER TYPE rainbow RENAME VALUE 'red' TO 'crimson';
ALTER TYPE
postgres=> SELECT * from t1;
colors
---------
crimson
orange
(2 rows)
```