Cider
Open in tool →Rust, honey and a moss green on cream — the orchard palette; the green keeps it from being all one temperature.
Color
#666538
#666538
hex
#666538rgb
rgb(102, 101, 56)hsl
hsl(59, 29%, 31%)oklch
oklch(0.496 0.065 107.4)Closest name: Eat Your Greens (#696845)Relative luminance 0.1242
Colors that go with #666538
Charcoal, Slate Blue and Champagne 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 #666538: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Slate Blue #6a5acd
complementaryshippedSlate Blue sits directly opposite #666538 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Champagne #f7e7ce
shipped6 real palettes, including BrandSweets's brand system and Forest Floor put Champagne beside #666538.
Copper #b87333
shippedDesigners have shipped Copper with #666538: 5 real palettes, including Clay & Linen and Riverbed, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #666538 in 4 real palettes, including Five Guys's brand system and Netflix's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #666538: 6 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #666538: 4 real palettes, including Newsprint and Fireside, as the lead colour.
Peru #cd853f
shipped4 real palettes, including Coffee Bar and Woodsmoke put Peru beside #666538, as the lead colour.
Real palettes that use #666538
Tints & shades
Harmonies
Contrast
| #666538 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.03:1 | pass | pass | fail |
|
Aaon black | 3.48:1 | fail | 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 #666538 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#666538 reads as warm, muted, editorial. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #666538
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #666538 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/666538-bbbea2-4e96df-272d1f-f1ede9?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