Color
#646b7d
#646b7drgb(100, 107, 125)hsl(223, 11%, 44%)oklch(0.528 0.03 268.6)Colors that go with #646b7d
Charcoal, Amber and Champagne 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 that reads cleanly against #646b7d without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #646b7d in 4 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour.
Champagne #f7e7ce
shipped6 real palettes, including BrandSweets's brand system and Coffee Bar put Champagne beside #646b7d.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #646b7d: 5 real palettes, including Ink & Paper and Fintech Trust, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #646b7d: 6 real palettes, including Riverbed and Dusk, as the accent.
Crimson #dc143c
shippedCrimson is paired with #646b7d in 9 real palettes, including Retro Pop and Wendy's's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #646b7d: 4 real palettes, including Deep Water and Warp's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #646b7d: 12 real palettes, including Campus and The New York Times's brand system, as the lead colour.
Real palettes that use #646b7d
Tints & shades
Harmonies
Contrast
| #646b7d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.33:1 | pass | pass | fail |
|
Aaon black | 3.94:1 | 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 #646b7d 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 #646b7d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/646b7d-9ca3c4-df704e-211f2d-e9eff1?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