Color
#421a56
#421a56rgb(66, 26, 86)hsl(280, 54%, 22%)oklch(0.308 0.108 312.5)Colors that go with #421a56
Charcoal, Sea Green 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 #421a56: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
complementaryshippedSea Green sits directly opposite #421a56 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped7 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #421a56, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #421a56: 6 real palettes, including SoFi's brand system and Open House, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #421a56: 4 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #421a56: 5 real palettes, including Dusk and Clean Beauty, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #421a56: 4 real palettes, including Blue Mono and Blizzard's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #421a56 in 10 real palettes, including Marvel's brand system and Casper Sleep's brand system, as the accent.
Real palettes that use #421a56
Tints & shades
Harmonies
Contrast
| #421a56 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.87:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.51:1 | 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 #421a56 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
#421a56 reads as cool, dark, luxury. 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 #421a56 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/421a56-b99fc1-b8cb62-2d1f2c-ebe9f1?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