About Random Color Generator

Bulk random colors (hex/rgb/hsl) — great for placeholders & mocks. Part of the DevTools Surf developer suite. Browse more tools in the Color collection.

Use Cases

• Generate placeholder colors for Storybook or empty states
• Produce random fills for chart demos
• Create unique tag/category colors without overlap
• Produce swatches for avatar generators and identicons

Tips

• Pass a count 1–200
• Each color is shown in hex + rgb + hsl
• Great for placeholder palettes in design mockups

Fun Facts

• True random RGB generation produces muddy greens and browns most of the time. Designers use 'golden ratio' hue spacing for visually pleasing random palettes.
• The golden ratio method for random colors uses a hue increment of ~137.5° (360° / φ), which maximizes the visual distance between consecutively generated colors.
• There are only ~17 million possible hex colors (#000000–#FFFFFF), but the human eye can only distinguish about 1 million of them under ideal conditions.

FAQ

Truly random or biased?

Uniform random in HSL space. Toggle to 'pleasant' mode which excludes near-black, near-white, and low-saturation combinations — better for UI randomization.

Can I seed it?

Yes — provide a seed for reproducible colors. Useful for deterministic avatars (hash username → seed → color).

What format does it output?

Hex, RGB, HSL, OKLCH. Pick whichever matches your pipeline.

How many at once?

Bulk mode generates up to 1000. For large datasets, consider whether truly-random colors are needed — most apps do better with a curated palette.