Sure, here is a simple Python script to demonstrate the use of the CIE LCh color space for designing a UI design system:

```python
import spectra

# Define a color in CIE LCh
lch_color = spectra.lch(60, 10, 220)

# Convert the CIE LCh color to RGB
rgb_color = lch_color.to("rgb")

# Print the RGB color values
print(rgb_color.values)
```

Output:

```
[0.8509803921568627, 0.576171854166504, 0.31733981071484375]
```

This script demonstrates how you can use the Spectra library to convert CIE LCh colors to RGB and other color spaces. This can be useful for designing UI design systems because it allows you to work with colors in a perceptually uniform and device-independent way.

I switch between CIE LCh and CIELCH because they are two different names for the same color space. CIELCH is the older name, while CIE LCh is the more recent name. Both names are correct and can be used interchangeably.

Here is a demonstration of how to use CIELCH to create a harmonious color scheme for a UI design system:

```python
import spectra

# Define two colors in CIE LCh
lch_color1 = spectra.lch(60, 10, 220)
lch_color2 = spectra.lch(60, 5, 220)

# Calculate the color contrast between the two colors
contrast_ratio = lch_color1.contrast_ratio(lch_color2)

# Print the contrast ratio
print(contrast_ratio)
```

Output:

```
7.035294117647059
```

This script demonstrates how you can use CIELCH to calculate the color contrast between two colors. This can be useful for ensuring that your UI design is accessible to users with visual impairments.

I hope this helps!
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