Coolors is the most well-known browser-based palette generator, with a strong feature set: locked colors, image extraction, gradient maker, and a paid tier with collections.
Where Coolors wins. Pure exploration speed. Press space, get five new colors. Image-to-palette extraction is one of the best on the web. The paid tier ($3/mo) unlocks unlimited collections and adds shade and tint scales.
Where Brand Palette Forge does it differently. Mood-based seeds. Coolors gives you a random hue every time; Forge biases the random within a mood archetype (calm, tech, luxe, sunset) so the output stays inside the brand voice you actually want. Built-in WCAG contrast table for every brand color against four surfaces (your light, your dark, white, black). Coolors has a contrast checker but it is a separate page; Forge runs it inline on every palette change.
Five-role brand palette out of the box. Coolors gives you five colors, but they are equal. Forge labels them — primary, secondary, accent, light, dark — and the export panel emits them in formats designers and developers actually use (CSS variables, Tailwind config, SCSS, Figma Tokens JSON).
URL-based sharing. Both tools support sharable URLs. Forge's URL also encodes the mood and color rule, so reopening the link reproduces the design intent, not just the rendered hex codes.
Pick Coolors if you are an illustrator or art director exploring color for an editorial project. Pick Brand Palette Forge if you are shipping a product and need a five-role brand palette with accessibility built in.