Color
#3f644a
#3f644argb(63, 100, 74)hsl(138, 23%, 32%)oklch(0.467 0.06 153)Colors that go with #3f644a
Charcoal, Blue and Cadet 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 text near-black for #3f644a: softer than #000 and cool enough to feel like part of the same palette.
Blue #0000ff
shipped4 real palettes, including Warp's brand system and Rolex's brand system put Blue beside #3f644a, as the supporting colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3f644a: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Champagne #f7e7ce
shipped5 real palettes, including Darkroom and BrandSweets's brand system put Champagne beside #3f644a, as the surface under it.
Copper #b87333
shippedDesigners have shipped Copper with #3f644a: 5 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #3f644a in 7 real palettes, including Gemstone and Five Guys's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #3f644a: 8 real palettes, including HP's brand system and Intel's brand system, as the accent.
Slate Blue #6a5acd
split-complementshippedSlate Blue is a split-complement of #3f644a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #3f644a
Tints & shades
Harmonies
Contrast
| #3f644a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.7:1 | pass | pass | fail |
|
Aaon black | 3.13:1 | 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 #3f644a 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 #3f644a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f644a-a2beae-be59d4-1f2d29-ebf1e9?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