Color
#99c581
#99c581rgb(153, 197, 129)hsl(99, 37%, 64%)oklch(0.775 0.104 135)Colors that go with #99c581
Charcoal, Lilac 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 #99c581: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Lilac #c8a2c8
complementaryshippedLilac sits directly opposite #99c581 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped5 real palettes, including Minecraft's brand system and League of Legends's brand system put Blue beside #99c581, as the accent.
Champagne #f7e7ce
shipped5 real palettes, including Forest Floor and Midnight Luxe put Champagne beside #99c581, as that palette's text colour.
Copper #b87333
shippedDesigners have shipped Copper with #99c581: 5 real palettes, including Desert Road and Clean Beauty, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #99c581 in 4 real palettes, including Tiffany & Co.'s brand system and Wise's brand system, as the supporting colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #99c581 in 4 real palettes, including Forest Floor and Undergrowth, as the supporting colour.
Hunter Green #355e3b
shippedHunter Green is paired with #99c581 in 6 real palettes, including Pine & Birch and Canopy, as the lead colour.
Real palettes that use #99c581
Tints & shades
Harmonies
Contrast
| #99c581 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.97:1 | fail | fail | fail | |
Aaon black | 10.66:1 | 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 #99c581 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 #99c581 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/99c581-a8bea2-664edf-1f2d21-f0f1e9?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