Color
#421fc1
#421fc1rgb(66, 31, 193)hsl(253, 72%, 44%)oklch(0.418 0.226 280.2)Colors that go with #421fc1
Charcoal, Denim and Cornflower 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 #421fc1: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
analogousshippedDenim is #421fc1's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #421fc1: 6 real palettes, including Blue Mono and Qualcomm's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #421fc1 in 7 real palettes, including Behance's brand system and Dunkin''s brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #421fc1: 6 real palettes, including Absolut's brand system and Cargo's brand system, as the supporting colour.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #421fc1 in 4 real palettes, including Indigo SaaS and Spotify's brand system, as the accent.
Midnight Blue #191970
shipped10 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #421fc1, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #421fc1 in 9 real palettes, including Intercom's brand system and Tide's brand system, as the supporting colour.
Real palettes that use #421fc1
Tints & shades
Harmonies
Contrast
| #421fc1 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.56:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.2:1 | 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 #421fc1 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
#421fc1 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 #421fc1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/421fc1-a99cc4-dfb84e-281f2d-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