Color
#21fd8f
#21fd8frgb(33, 253, 143)hsl(150, 98%, 56%)oklch(0.874 0.217 153.6)Colors that go with #21fd8f
Violet, Deep Sky Blue and Light Coral 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.
Violet #ee82ee
complementaryViolet sits directly opposite #21fd8f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #21fd8f: 3 real palettes, including Prime Video's brand system and Remix's brand system, as the supporting colour.
Light Coral #f08080
split-complementLight Coral is a split-complement of #21fd8f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Plum #dda0dd
split-complementPlum is a split-complement of #21fd8f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralCharcoal is the text near-black for #21fd8f: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #21fd8f in two real palettes: Wise's brand system and Formula 1's brand system, as the accent.
Lime Green #32cd32
shippedTwo real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #21fd8f, as the lead colour.
Red #ff0000
shippedRed is paired with #21fd8f in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour.
Real palettes that use #21fd8f
Tints & shades
Harmonies
Contrast
| #21fd8f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.35:1 | fail | fail | fail | |
Aaon black | 15.51:1 | 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 #21fd8f 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 #21fd8f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21fd8f-a2beb3-d459d2-1f2d2c-e9f1ea?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