Color
#3f435a
#3f435argb(63, 67, 90)hsl(231, 18%, 30%)oklch(0.389 0.039 276.7)Colors that go with #3f435a
Steel Blue, Dark Olive Green 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #3f435a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dark Olive Green #556b2f
complementaryshippedDark Olive Green sits directly opposite #3f435a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shippedBlue is paired with #3f435a in 5 real palettes, including Dunkin''s brand system and Headspace's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Blush Pink #e8b4b8
shippedBlush Pink is paired with #3f435a in 4 real palettes, including Nursery and Garden Wedding, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #3f435a in 5 real palettes, including Paper & Pine and Clean Beauty, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Copper #b87333
shippedCopper is paired with #3f435a in 6 real palettes, including Notion's brand system and Desert Road — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #3f435a in 10 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3f435a: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3f435a
Tints & shades
Harmonies
Contrast
| #3f435a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.71:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.16:1 | 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 #3f435a as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#3f435a reads as cool, muted, dark. The font library is tagged with the same vocabulary:
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 #3f435a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f435a-9c9ec4-df834e-231f2d-e9eef1?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