Color
#21f2cf
#21f2cfrgb(33, 242, 207)hsl(170, 89%, 54%)oklch(0.861 0.156 176.8)Colors that go with #21f2cf
Charcoal, Deep Sky Blue and Taupe lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #21f2cf: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #21f2cf: 4 real palettes, including Astro's brand system and Prime Video's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #21f2cf in 6 real palettes, including Astro's brand system and Mint Chip, as the text colour against it.
Hot Pink #ff69b4
complementaryHot Pink sits directly opposite #21f2cf on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #21f2cf in 3 real palettes, including Formula 1's brand system and Frost & Ember, as the supporting colour.
Plum #dda0dd
triadicshippedPlum completes a triad with #21f2cf — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Red #ff0000
shippedRed is paired with #21f2cf in 3 real palettes, including Gatorade's brand system and Mattel's brand system, as the supporting colour.
Salmon #fa8072
split-complementSalmon is a split-complement of #21f2cf: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #21f2cf
Tints & shades
Harmonies
Contrast
| #21f2cf as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.43:1 | fail | fail | fail | |
Aaon black | 14.67:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21f2cf as the background.
Brands using this color
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #21f2cf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21f2cf-a2bebd-d459a9-1f292d-e9f1ec?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md