Designing weather icons where dark clouds turn purple can create a visually striking and unique representation. Here is a detailed design description:

Flat Design: Use a clean, flat design style to ensure clarity and simplicity. Vector Graphics: Design icons as vector graphics to maintain quality at various sizes. Consistent Theme: Ensure all icons follow a consistent theme and color scheme for uniformity.

Purple Clouds: Choose a range of purple shades for the clouds. Use darker purples for stormy or severe weather, and lighter purples for overcast but calm conditions.

Opacity and Size: The logo can be rendered in a semi-transparent form, ensuring it blends smoothly with various background textures and colors. Adjusting the size appropriately allows it to be visible yet unobtrusive.

Gradient Effects: Apply subtle gradient effects to give depth to the clouds, transitioning from a darker purple at the bottom to a lighter purple at the top. Background Colors: Use a neutral or contrasting background color to make the purple clouds stand out. Light blues or grays can work well as they suggest sky tones without overpowering the purple.