Color
#818cbb
#818cbbrgb(129, 140, 187)hsl(229, 30%, 62%)oklch(0.649 0.072 274.1)Colors that go with #818cbb
Charcoal, Copper 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 #818cbb: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
split-complementshippedCopper is a split-complement of #818cbb: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #818cbb in 7 real palettes, including Blueprint and Beach Hut, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #818cbb: 6 real palettes, including Telegram's brand system and Blueprint, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #818cbb: 7 real palettes, including Dusk and Open House, as the lead colour.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #818cbb in 4 real palettes, including Indigo SaaS and Terminal, as the accent.
Midnight Blue #191970
shipped8 real palettes, including Plaid's brand system and Open House put Midnight Blue beside #818cbb, as the supporting colour.
Orange #ffa500
shipped4 real palettes, including Graphite and Gopro's brand system put Orange beside #818cbb, as the accent.
Real palettes that use #818cbb
Tints & shades
Harmonies
Contrast
| #818cbb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.28:1 | fail | pass | fail | |
Aaon black | 6.4:1 | 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 #818cbb 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 #818cbb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/818cbb-9c9fc4-df7e4e-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