Color
#21f298
#21f298rgb(33, 242, 152)hsl(154, 89%, 54%)oklch(0.848 0.196 157.1)Colors that go with #21f298
Violet, Charcoal and Deep Sky Blue 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 #21f298 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #21f298: 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 #21f298: 3 real palettes, including Prime Video's brand system and Remix's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #21f298 in 3 real palettes, including MongoDB's brand system and Docker's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #21f298 in 3 real palettes, including 7-Eleven's brand system and Astro's brand system, as the lead colour.
Light Coral #f08080
split-complementLight Coral is a split-complement of #21f298: 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 #21f298: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Yellow Green #9acd32
analogousshippedYellow Green is #21f298's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Real palettes that use #21f298
Tints & shades
Harmonies
Contrast
| #21f298 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.48:1 | fail | fail | fail | |
Aaon black | 14.22:1 | 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 #21f298 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 #21f298 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21f298-a2beb5-d459ca-1f2d2d-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