# LabColorSpace Class

> A Lab color space is a CIE-based ABC color space with two transformation stages.

- Product: Adobe PDF Library 18
- Language: Java
- Version: APDFL18.0.5PlusP2a
- HTML page: https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/class/LabColorSpace
- Version index: https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/llms.txt

```java
class LabColorSpace : ColorSpace
```

**Namespace:** `com::datalogics::PDFL`

**Inherits from:** [`ColorSpace`](https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/class/ColorSpace.md)

## Description

A Lab color space is a CIE-based ABC color space with two transformation stages. In this type of space, A, B, and C represent the L*, a*, and b* components of a CIE 1976 L*a*b* space. The range of the first (L*) component is always 0 to 100; the ranges of the second and third (a* and b*) components are defined by the Range.

**Uses types:** [`ColorSpace`](https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/class/ColorSpace.md), [`PDFObject`](https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/class/PDFObject.md)

## Constructors

### LabColorSpace

```java
com.datalogics.PDFL.LabColorSpace.LabColorSpace(java.util.List< Double > whitePoint)
```

*constructor*

**Parameters**

- `whitePoint` (`java.util.List< Double >`): An array of three numbers specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse white point. The numbers X and Z must be positive, and Y must be equal to 1.0.

Create a Lab color space.

The blackPoint defaults to [0.0, 0.0, 0.0].

The range defaults to [-100 100 -100 100]

### LabColorSpace

```java
com.datalogics.PDFL.LabColorSpace.LabColorSpace(java.util.List< Double > whitePoint, java.util.List< Double > blackPoint, java.util.List< Double > range)
```

*constructor*

**Parameters**

- `whitePoint` (`java.util.List< Double >`): An array of three numbers specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse white point. The numbers X and Z must be positive, and Y must be equal to 1.0.
- `blackPoint` (`java.util.List< Double >`): An array of three numbers specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse black point. All three of these numbers must be non-negative.
- `range` (`java.util.List< Double >`): An array of four numbers [ amin amax bmin bmax ] specifying the range of valid values for the a* and b* (B and C) components of the color space.

Create a Lab color space.

## Fields

### DEVICE_CMYK

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.DEVICE_CMYK
```

*static*

### DEVICE_GRAY

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.DEVICE_GRAY
```

*static*

### DEVICE_RGB

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.DEVICE_RGB
```

*static*

### DEVICE_RGBA

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.DEVICE_RGBA
```

*static*

### LAB

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.LAB
```

*static*

### LAB_A

```java
static final ColorSpace com.datalogics.PDFL.ColorSpace.LAB_A
```

*static*

## Methods

### delete

```java
synchronized void com.datalogics.PDFL.LabColorSpace.delete(Boolean disposing)
```

*protected*

**Parameters**

- `disposing` (`Boolean`)

**Returns:** `synchronized void`

### delete

```java
synchronized void com.datalogics.PDFL.LabColorSpace.delete()
```

**Returns:** `synchronized void`

### equals

```java
boolean com.datalogics.PDFL.ColorSpace.equals(Object rhs)
```

**Parameters**

- `rhs` (`Object`)

**Returns:** `boolean`

### finalize

```java
void com.datalogics.PDFL.LabColorSpace.finalize()
```

*protected*

**Returns:** `void`

### getBlackPoint

```java
java.util.List< Double > com.datalogics.PDFL.LabColorSpace.getBlackPoint()
```

**Returns:** `java.util.List< Double >`

An array of three numbers specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse black point. All three of these numbers must be non-negative.

### getName

```java
String com.datalogics.PDFL.ColorSpace.getName()
```

**Returns:** `String`

The name of the color space. A named color space may be named something like DeviceRGB. More complicated color spaces may have a name like Indexed or ICCBased.

### getNumComponents

```java
int com.datalogics.PDFL.ColorSpace.getNumComponents()
```

**Returns:** `int`

The number of components in the color space.

### getPDFObject

```java
PDFObject com.datalogics.PDFL.ColorSpace.getPDFObject()
```

**Returns:** [`PDFObject`](https://docs.datalogics.com/apdfl18/Java/APDFL18.0.5PlusP2a/class/PDFObject.md)

The PDFObject associated with the color space.

Get the PDFObject associated with the color space. This may be a PDFName, PDFDict, PDFStream, or PDFArray.

### getRange

```java
java.util.List< Double > com.datalogics.PDFL.LabColorSpace.getRange()
```

**Returns:** `java.util.List< Double >`

An array of four numbers [ amin amax bmin bmax ] specifying the range of valid values for the a* and b* (B and C) components of the color space.

### getWhitePoint

```java
java.util.List< Double > com.datalogics.PDFL.LabColorSpace.getWhitePoint()
```

**Returns:** `java.util.List< Double >`

An array of three numbers specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse white point. The numbers X and Z must be positive, and Y must be equal to 1.0.

### toString

```java
String com.datalogics.PDFL.ColorSpace.toString()
```

**Returns:** `String`

Convert a colorSpace to a string.