Color
#503bc9
#503bc9rgb(80, 59, 201)hsl(249, 57%, 51%)oklch(0.47 0.208 281.6)Colors that go with #503bc9
Slate Gray, Olive Green and Charcoal 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.
Slate Gray #708090
shippedSlate Gray is paired with #503bc9 in 4 real palettes, including Indigo SaaS and Campus, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Olive Green #808000
complementaryOlive Green sits directly opposite #503bc9 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #503bc9: softer than #000 and cool enough to feel like part of the same palette.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #503bc9 in 3 real palettes, including Indigo SaaS and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #503bc9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sienna #a0522d
split-complementSienna is a split-complement of #503bc9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Dark Orchid #9932cc
analogousshippedDark Orchid is #503bc9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Light Sky Blue #87cefa
shippedLight Sky Blue is paired with #503bc9 in two real palettes: Calm's brand system and Telehealth, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #503bc9
Tints & shades
Harmonies
Contrast
| #503bc9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.47:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.81:1 | 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 #503bc9 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#503bc9 reads as cool, modern. The font library is tagged with the same vocabulary:
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 #503bc9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/503bc9-a79cc4-dfae4e-271f2d-e9ecf1?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