Color
#99c591
#99c591rgb(153, 197, 145)hsl(111, 31%, 67%)oklch(0.778 0.086 140.7)Colors that go with #99c591
Charcoal, Plum and 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.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #99c591: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Plum #dda0dd
complementaryshippedPlum sits directly opposite #99c591 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped6 real palettes, including League of Legends's brand system and Unity's brand system put Blue beside #99c591, as the supporting colour.
Champagne #f7e7ce
shipped5 real palettes, including Forest Floor and Midnight Luxe put Champagne beside #99c591, as that palette's text colour.
Copper #b87333
shippedDesigners have shipped Copper with #99c591: 5 real palettes, including Clean Beauty and Desert Road, as the accent.
Crimson #dc143c
shippedCrimson is paired with #99c591 in 4 real palettes, including Tiffany & Co.'s brand system and Cartier's brand system, as the supporting colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #99c591 in 4 real palettes, including Forest Floor and Undergrowth, as the supporting colour.
Hunter Green #355e3b
shippedHunter Green is paired with #99c591 in 6 real palettes, including Canopy and Pine & Birch, as the lead colour.
Real palettes that use #99c591
Tints & shades
Harmonies
Contrast
| #99c591 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.95:1 | fail | fail | fail | |
Aaon black | 10.75:1 | 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 #99c591 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 #99c591 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/99c591-a3bea2-834edf-1f2d23-eef1e9?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