Dusk
Open in tool →Slate blue with a copper accent — calm, professional, slightly editorial; suits consultancies and journals.
Color
#8591b2
#8591b2
hex
#8591b2rgb
rgb(133, 145, 178)hsl
hsl(224, 23%, 61%)oklch
oklch(0.659 0.051 269.3)Closest name: Cool Gray (#8c92ac)Relative luminance 0.2845
Colors that go with #8591b2
Charcoal, Amber and Copper 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 #8591b2: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #8591b2 in 4 real palettes, including Beach Hut and Ahrefs's brand system, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #8591b2: 5 real palettes, including Dusk and Atelier, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #8591b2: 4 real palettes, including Telegram's brand system and Snowflake AI Data Cloud's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #8591b2: 5 real palettes, including Dusk and Open House, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Open House and Plaid's brand system put Midnight Blue beside #8591b2, as the text colour against it.
Peru #cd853f
split-complementshippedPeru is a split-complement of #8591b2: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #8591b2: 5 real palettes, including Ink Wash and First Snow, as the lead colour.
Real palettes that use #8591b2
Tints & shades
Harmonies
Contrast
| #8591b2 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.14:1 | fail | pass | fail | |
Aaon black | 6.69:1 | 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 #8591b2 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #8591b2
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #8591b2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/8591b2-9ca2c4-df724e-221f2d-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