Color
#420cd4
#420cd4rgb(66, 12, 212)hsl(256, 89%, 44%)oklch(0.427 0.255 278.5)Colors that go with #420cd4
Charcoal, Cobalt Blue 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 #420cd4: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #420cd4: 4 real palettes, including Oreo's brand system and CVS's brand system, as the lead colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #420cd4: 4 real palettes, including Qualcomm's brand system and Spotify's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #420cd4: 5 real palettes, including Cargo's brand system and Readymag's brand system, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Kraken's brand system and Monzo's brand system put Midnight Blue beside #420cd4, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #420cd4 in 7 real palettes, including Intercom's brand system and Prepare your taste buds...'s brand system, as the supporting colour.
Red #ff0000
shippedRed is paired with #420cd4 in 5 real palettes, including Twitch's brand system and Pepsi's brand system, as the accent.
Olive Green #808000
complementaryOlive Green sits directly opposite #420cd4 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 #420cd4
Tints & shades
Harmonies
Contrast
| #420cd4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.4:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.23:1 | 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 #420cd4 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
#420cd4 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 #420cd4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/420cd4-ab9cc4-dfbf4e-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