Color
#3d646b
#3d646brgb(61, 100, 107)hsl(189, 27%, 33%)oklch(0.477 0.045 210.1)Colors that go with #3d646b
Steel Blue, 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #3d646b'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 #3d646b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped5 real palettes, including Warp's brand system and Rolex's brand system put Blue beside #3d646b, as the supporting colour.
Blush Pink #e8b4b8
shipped4 real palettes, including Graphite Mono and Blush put Blush Pink beside #3d646b, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3d646b: 4 real palettes, including Alpine and Open House, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #3d646b: 4 real palettes, including Ink & Paper and Fintech Trust, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #3d646b: 5 real palettes, including Desert Road and Dusk, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3d646b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3d646b
Tints & shades
Harmonies
Contrast
| #3d646b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.49:1 | pass | pass | fail |
|
Aaon black | 3.23:1 | 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 #3d646b 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 #3d646b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3d646b-a2b7be-df4e7e-1f252d-e9f1ee?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