Color
#21e4dd
#21e4ddrgb(33, 228, 221)hsl(178, 78%, 51%)oklch(0.832 0.139 190.8)Colors that go with #21e4dd
Charcoal, Deep Sky Blue and Crimson 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 #21e4dd: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
analogousshippedDeep Sky Blue is #21e4dd's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Crimson #dc143c
shippedCrimson is paired with #21e4dd in 4 real palettes, including Formula 1's brand system and Tiffany & Co.'s brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #21e4dd in 9 real palettes, including Astro's brand system and Crayon Box, as the text colour against it.
Light Coral #f08080
complementaryLight Coral sits directly opposite #21e4dd on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #21e4dd: 3 real palettes, including Bluesky Social's brand system and Patreon's brand system, as the lead colour.
Wheat #f5deb3
shippedDesigners have shipped Wheat with #21e4dd: 3 real palettes, including Mint Chip and Oatly's brand system, as the accent.
Goldenrod #daa520
triadicshippedGoldenrod completes a triad with #21e4dd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #21e4dd
Tints & shades
Harmonies
Contrast
| #21e4dd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.59:1 | fail | fail | fail | |
Aaon black | 13.21:1 | 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 #21e4dd as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #21e4dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21e4dd-a2bcbe-d45999-1f282d-e9f1ed?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