Color
#5b618b
#5b618brgb(91, 97, 139)hsl(233, 21%, 45%)oklch(0.505 0.067 277.4)Colors that go with #5b618b
Charcoal, Amber 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #5b618b: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #5b618b in 6 real palettes, including McDonald's's brand system and Lemon Squeezy's brand system, as the lead colour.
Blue #0000ff
shipped4 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #5b618b, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #5b618b: 7 real palettes, including Fintech Trust and Ink & Paper, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #5b618b in 17 real palettes, including Retro Pop and Marvel's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #5b618b: 11 real palettes, including The New York Times's brand system and Campus, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #5b618b: 6 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour.
Dark Olive Green #556b2f
complementaryDark Olive Green sits directly opposite #5b618b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #5b618b
Tints & shades
Harmonies
Contrast
| #5b618b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.95:1 | pass | pass | fail |
|
Aaon black | 3.53:1 | 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 #5b618b 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 #5b618b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5b618b-9c9cc4-df884e-241f2d-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