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Sass also allows us to perform mathematical functions to compute measurements— including colors.

Here is how Sass computes colors:

- The operation is performed on the red, green, and blue components.
- It computes the answer by operating on every two digits.

```
$color: #010203 + #040506;
```

The above would compute piece-wise as follows:

```
01 + 04 = 05
02 + 05 = 07
03 + 06 = 09
```

and compile to:

```
color: #050709;
```

Sass arithmetic can also compute HSLA and string colors such as `red`

and `blue`

.

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