Olive Grove
Open in tool →Olive and straw with a rust accent — Mediterranean and unhurried; good for food, wine and hospitality.
Color
#666e21
#666e21
hex
#666e21rgb
rgb(102, 110, 33)hsl
hsl(66, 54%, 28%)oklch
oklch(0.515 0.1 115.1)Closest name: darkolivegreen (#556b2f)Relative luminance 0.1409
Colors that go with #666e21
Charcoal, Royal Blue and Blue Violet 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 #666e21: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
split-complementshippedRoyal Blue is a split-complement of #666e21: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue Violet #8a2be2
complementaryshippedBlue Violet sits directly opposite #666e21 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Warp's brand system and Kia's brand system put Blue beside #666e21, as the supporting colour.
Champagne #f7e7ce
shipped6 real palettes, including Forest Floor and BrandSweets's brand system put Champagne beside #666e21, as that palette's text colour.
Copper #b87333
shippedDesigners have shipped Copper with #666e21: 4 real palettes, including Clay & Linen and Wellness, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #666e21 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 #666e21: 5 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour.
Real palettes that use #666e21
Tints & shades
Harmonies
Contrast
| #666e21 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.5:1 | pass | pass | fail |
|
Aaon black | 3.82:1 | 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 #666e21 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
#666e21 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #666e21
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 #666e21 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/666e21-b8bea2-4e86df-262d1f-f1eee9?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