Color
#647a87
#647a87rgb(100, 122, 135)hsl(202, 15%, 46%)oklch(0.567 0.033 234.1)Colors that go with #647a87
Charcoal, Sienna and Amber 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 for #647a87: softer than #000 and cool enough to feel like part of the same palette.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #647a87 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #647a87 in 4 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour.
Champagne #f7e7ce
shipped6 real palettes, including Forest Floor and Midnight Luxe put Champagne beside #647a87, as that palette's text colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #647a87: 6 real palettes, including Ink & Paper and Fintech Trust, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #647a87: 7 real palettes, including Riverbed and Atelier, as the accent.
Crimson #dc143c
shippedCrimson is paired with #647a87 in 11 real palettes, including Retro Pop and Redfin's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #647a87: 4 real palettes, including Deep Water and Astro's brand system, as the lead colour.
Real palettes that use #647a87
Tints & shades
Harmonies
Contrast
| #647a87 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.49:1 | fail | pass | fail | |
Aaon black | 4.68:1 | pass | 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 #647a87 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 #647a87 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/647a87-9cb1c4-df4e5f-1f222d-e9f1f0?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