Color
#503c8b
#503c8brgb(80, 60, 139)hsl(255, 40%, 39%)oklch(0.42 0.126 291.7)Colors that go with #503c8b
Charcoal, Royal Blue 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 #503c8b: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #503c8b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped6 real palettes, including CVS's brand system and Tesco's brand system put Blue beside #503c8b, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #503c8b in 11 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #503c8b: 13 real palettes, including Unilever's brand system and Warbyparker's brand system, as the accent.
Midnight Blue #191970
shipped15 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #503c8b, as that palette's text colour.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of #503c8b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #503c8b: 8 real palettes, including FedEx's brand system and Fintech Trust, as the accent.
Real palettes that use #503c8b
Tints & shades
Harmonies
Contrast
| #503c8b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.9:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.36:1 | 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 #503c8b 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
#503c8b 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 #503c8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/503c8b-ab9cc4-dfbd4e-291f2d-e9ebf1?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