Color
#273cdd
#273cddrgb(39, 60, 221)hsl(233, 73%, 51%)oklch(0.467 0.24 268)Colors that go with #273cdd
Charcoal, Sea Green and Amber 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 #273cdd: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #273cdd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #273cdd in 5 real palettes, including Walmart's brand system and Binance's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #273cdd in 8 real palettes, including Qualcomm's brand system and Spotify's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #273cdd in 11 real palettes, including Behance's brand system and Coinbase's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #273cdd in 4 real palettes, including Warp's brand system and Kraken's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #273cdd in 8 real palettes, including Coursera's brand system and Cargo's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #273cdd in 6 real palettes, including Indigo SaaS and Spotify's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #273cdd
Tints & shades
Harmonies
Contrast
| #273cdd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.56:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.78:1 | 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 #273cdd as the background.
Brands using this color
Fonts for this mood
#273cdd 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 #273cdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/273cdd-9c9cc4-df884e-241f2d-e9eef1?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