Color
#3f435f
#3f435frgb(63, 67, 95)hsl(233, 20%, 31%)oklch(0.391 0.048 277.7)Colors that go with #3f435f
Steel Blue, Blue and Blush Pink 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 #3f435f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Alaska Airlines's brand system and Dunkin''s brand system put Blue beside #3f435f, as the accent.
Blush Pink #e8b4b8
shipped4 real palettes, including Nursery and Garden Wedding put Blush Pink beside #3f435f, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3f435f: 5 real palettes, including Paper & Pine and Dusk, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #3f435f: 5 real palettes, including Notion's brand system and Desert Road.
Crimson #dc143c
shippedCrimson is paired with #3f435f in 6 real palettes, including Codecademy's brand system and Frost & Ember, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #3f435f: 9 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3f435f: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3f435f
Tints & shades
Harmonies
Contrast
| #3f435f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.64:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.18:1 | 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 #3f435f as the background.
Brands using this color
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 #3f435f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f435f-9c9cc4-df884e-241f2d-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