Color
#421bc0
#421bc0rgb(66, 27, 192)hsl(254, 75%, 43%)oklch(0.413 0.227 280.6)Colors that go with #421bc0
Charcoal, Denim 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 #421bc0: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
analogousshippedDenim is #421bc0's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shippedBlue is paired with #421bc0 in 4 real palettes, including Zillow's brand system and Procter & Gamble's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #421bc0 in 4 real palettes, including Blue Mono and Qualcomm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #421bc0 in 4 real palettes, including Behance's brand system and Dunkin''s brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #421bc0 in 7 real palettes, including Kraken's brand system and Blue Mono, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #421bc0 in 6 real palettes, including Intercom's brand system and Tide's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Red #ff0000
shippedRed is paired with #421bc0 in 4 real palettes, including Twitch's brand system and Pepsi's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #421bc0
Tints & shades
Harmonies
Contrast
| #421bc0 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.77:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.15:1 | 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 #421bc0 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
#421bc0 reads as cool, vivid, technical. 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 #421bc0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/421bc0-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