Color
#503f88
#503f88rgb(80, 63, 136)hsl(254, 37%, 39%)oklch(0.423 0.117 291.3)Colors that go with #503f88
Charcoal, Steel 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 #503f88: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #503f88'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 #503f88, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #503f88 in 12 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #503f88: 14 real palettes, including HP's brand system and Unilever's brand system, as the accent.
Midnight Blue #191970
shipped16 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #503f88, as that palette's text colour.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #503f88: 4 real palettes, including First Snow and Glacier, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #503f88 in 14 real palettes, including Nokia's brand system and Carrefour's brand system, as the supporting colour.
Real palettes that use #503f88
Tints & shades
Harmonies
Contrast
| #503f88 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.72:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.41:1 | 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 #503f88 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
#503f88 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 #503f88 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/503f88-aa9cc4-dfbb4e-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