Color
#421bd0
#421bd0rgb(66, 27, 208)hsl(253, 77%, 46%)oklch(0.431 0.244 278.5)Colors that go with #421bd0
Charcoal, Cornflower Blue and Crimson 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 #421bd0: softer than #000 and cool enough to feel like part of the same palette.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #421bd0 in 5 real palettes, including Qualcomm's brand system and Blue Mono, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #421bd0 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.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #421bd0 in 5 real palettes, including Cargo's brand system and Readymag's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #421bd0 in 7 real palettes, including Kraken's brand system and Purina Pro Plan's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #421bd0 in 7 real palettes, including Prepare your taste buds...'s brand system and Intercom's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Red #ff0000
shippedRed is paired with #421bd0 in 5 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #421bd0 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #421bd0
Tints & shades
Harmonies
Contrast
| #421bd0 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.13:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.3:1 | 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 #421bd0 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
#421bd0 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 #421bd0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/421bd0-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