Web-safe colors

Client

Each channel uses six steps (0 and every 51 up to 255). Choose whether clicks copy #RRGGBB, rgb(), or rgba(..., 1).

What the 216 palette is

The classic 6×6×6 web-safe cube dates to 8-bit displays—still referenced in email HTML and legacy style guides. Modern screens are wider gamut; use this when you intentionally want that constrained set.

216 web-safe colors

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The classic 6×6×6 cube: red, green, and blue each take values in 0, 51, 102, 153, 204, 255. Click a swatch to copy in the format you selected below.
Copy formatCopy as

Nearby workflows on Toolcore

  • Color converter — to see non–web-safe equivalents for a picked cube color.
  • WCAG contrast — because many cube pairs fail modern text contrast targets.
  • Harmony palette — when you outgrow the 216 swatches for brand work.

Common use cases

  • Grab predictable HEX or rgb() values when you need a small, shared palette across legacy HTML or email templates.
  • Teach or demo how early web palettes quantized RGB channels to six steps per channel.
  • Pick a neutral or accent swatch quickly when you do not need full OKLCH or brand-grade precision.

Common mistakes to avoid

  • Assuming modern screens still require “web-safe” only

    Today’s displays handle millions of colors. Web-safe sets remain useful for education and constrained workflows—not a universal quality bar.

FAQ

Why 216 colors?

Six levels per red, green, and blue (including 0 and 255) give 6³ = 216 combinations—the classic “web-safe” cube.

Is anything uploaded?

No. The grid and copy actions run entirely in your browser.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • 216 web safe colors
  • web safe color palette online
  • browser safe colors hex list

More tools

Related utilities you can open in another tab—mostly client-side.