Color
#218c4e
#218c4ergb(33, 140, 78)hsl(145, 62%, 34%)oklch(0.566 0.134 152.7)Colors that go with #218c4e
Charcoal, Royal Blue and Medium Violet Red 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 #218c4e: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #218c4e — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Medium Violet Red #c71585
complementaryshippedMedium Violet Red sits directly opposite #218c4e on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Copper #b87333
shippedDesigners have shipped Copper with #218c4e: 4 real palettes, including Wellness and Riverbed, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #218c4e in 7 real palettes, including Coinbase's brand system and Five Guys's brand system.
Denim #1560bd
shippedDesigners have shipped Denim with #218c4e: 6 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour.
Midnight Blue #191970
shipped4 real palettes, including Paramount+'s brand system and Telehealth put Midnight Blue beside #218c4e, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #218c4e in 12 real palettes, including Subaru's brand system and Acer's brand system, as that palette's text colour.
Real palettes that use #218c4e
Tints & shades
Harmonies
Contrast
| #218c4e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.26:1 | fail | pass | fail | |
Aaon black | 4.93:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #218c4e 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 #218c4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/218c4e-a2beb1-cc59d4-1f2d2b-eaf1e9?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