Logo
The symbol is a cross with one corner scooped away: four arms, three square, one curved, like a crystal catching light from one side. The wordmark is Halide in a plain grotesk, set tight, with the l and the d standing taller than the cross. Use the lockup in the product header and on documents, the stacked version where the space is square, and the symbol alone as the app icon, the favicon and the mark on a slide.
Keep a clear space around the logo equal to the width of one arm of the cross, on every side. Nothing crosses it: no type, no interface, no edge of a screen. On a small surface, scale the logo down before you shrink the space.
The logo is Fog on Carbon, almost always. On a light ground it is Carbon. It is never set in the Signal gradient, and never placed over a chart or a block of code. Give it black, and room.