Gemstone
Open in tool →Emerald, amethyst and ruby on velvet-black — the jewel-tone trio; the surface must be dark or the stones go plastic.
Color
#840fcc
#840fcc
hex
#840fccrgb
rgb(132, 15, 204)hsl
hsl(277, 86%, 43%)oklch
oklch(0.491 0.247 305.5)Closest name: Lilac Spring (#8822cc)Relative luminance 0.0961
Colors that go with #840fcc
Olive Green, Teal and Sea Green 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #840fcc on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Teal #008080
triadicshippedTeal completes a triad with #840fcc — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #840fcc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralCharcoal is the text near-black for #840fcc: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDenim is paired with #840fcc in two real palettes: Peacock and Slack's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
triadicSienna completes a triad with #840fcc — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Crimson #dc143c
shippedCrimson is paired with #840fcc in Gemstone, as the accent — a combination designers have actually shipped, not a computed rotation.
Dark Cyan #008b8b
shippedDark Cyan is paired with #840fcc in Peacock, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #840fcc
Tints & shades
Harmonies
Contrast
| #840fcc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.19:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.92:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #840fcc 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
Fonts for this mood
#840fcc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #840fcc
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 #840fcc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/840fcc-b99cc4-bdcb62-2d1f2c-eae9f1?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