Color
#3f4e5f
#3f4e5frgb(63, 78, 95)hsl(212, 20%, 31%)oklch(0.418 0.034 251.8)Colors that go with #3f4e5f
Teal, Sienna and 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.
Teal #008080
analogousshippedTeal is #3f4e5f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #3f4e5f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped7 real palettes, including Jeep's brand system and Alaska Airlines's brand system put Blue beside #3f4e5f, as the accent.
Blush Pink #e8b4b8
shipped4 real palettes, including Nursery and Garden Wedding put Blush Pink beside #3f4e5f, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3f4e5f: 4 real palettes, including Paper & Pine and Dusk, as the supporting colour.
Champagne #f7e7ce
shipped4 real palettes, including Darkroom and Sweetgreen's brand system put Champagne beside #3f4e5f, as the surface under it.
Copper #b87333
shippedDesigners have shipped Copper with #3f4e5f: 5 real palettes, including Desert Road and Dusk, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3f4e5f: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3f4e5f
Tints & shades
Harmonies
Contrast
| #3f4e5f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.51:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.47:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f4e5f 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 #3f4e5f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f4e5f-9caac4-df564e-1f202d-e9f1f1?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