Go to [https://lucid.app/](https://lucid.app/)
Click the "Create" button in the top right corner of the page.
Click the "Shapes" button in the left-hand toolbar.
Drag and drop the "Legend" shape onto the canvas.
Click the "Text" button in the left-hand toolbar.
Drag and drop the "Text" shape onto the canvas.
Enter the desired text into the text box.
Click the "Format" button in the left-hand toolbar.
Select the desired font, font size, and font color.
Click the "Line" button in the left-hand toolbar.
Drag and drop the "Line" shape onto the canvas.
Select the desired line color and line thickness.
Click the "Arrange" button in the left-hand toolbar.
Select the desired arrangement for the legend.