Color
#509f8d
#509f8drgb(80, 159, 141)hsl(166, 33%, 47%)oklch(0.647 0.083 176.8)Colors that go with #509f8d
Charcoal, Copper and Blush Pink 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 #509f8d: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
triadicshippedCopper completes a triad with #509f8d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blush Pink #e8b4b8
shipped4 real palettes, including Rain Garden and Estate put Blush Pink beside #509f8d, as the accent.
Crimson #dc143c
shippedCrimson is paired with #509f8d in 7 real palettes, including Diner and DuckDuckGo's brand system, as the lead colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #509f8d in 5 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #509f8d: 7 real palettes, including Peacock and Dusk, as the supporting colour.
Midnight Blue #191970
shipped9 real palettes, including Tide Pool and Fintech Trust put Midnight Blue beside #509f8d, as that palette's text colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #509f8d in 7 real palettes, including Brilliant's brand system and Khan Academy's brand system, as the accent.
Real palettes that use #509f8d
Tints & shades
Harmonies
Contrast
| #509f8d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.14:1 | fail | pass | fail | |
Aaon black | 6.68:1 | 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 #509f8d 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 #509f8d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/509f8d-a2bebb-d459b1-1f2a2d-e9f1ec?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