Oatmeal
Open in tool →Four warm greys from bark to oat — the neutral palette that photographs well and never argues with a product shot.
Color
#666357
#666357
hex
#666357rgb
rgb(102, 99, 87)hsl
hsl(48, 8%, 37%)oklch
oklch(0.499 0.019 95.4)Closest name: Black Forest (#5e6354)Relative luminance 0.1244
Colors that go with #666357
Charcoal, Champagne and Copper 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 that reads cleanly against #666357 without the hard edge of pure #000.
Champagne #f7e7ce
shipped6 real palettes, including BrandSweets's brand system and Coffee Bar put Champagne beside #666357.
Copper #b87333
shippedDesigners have shipped Copper with #666357: 6 real palettes, including Clay & Linen and Desert Road, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #666357 in 6 real palettes, including Gemstone and Five Guys's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #666357: 7 real palettes, including Campus and HP's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #666357 in 5 real palettes, including Mid-Century and Fireside, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #666357 in 4 real palettes, including Undergrowth and Console Light, as the lead colour.
Midnight Blue #191970
shipped5 real palettes, including Lufthansa's brand system and Paramount+'s brand system put Midnight Blue beside #666357, as the lead colour.
Real palettes that use #666357
Tints & shades
Harmonies
Contrast
| #666357 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.02:1 | pass | pass | fail |
|
Aaon black | 3.49:1 | 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 #666357 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#666357 reads as muted, minimal. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #666357
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 #666357 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/666357-c4c09c-62aacb-2a2d1f-f1ece9?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