Color
#378fbe
#378fbergb(55, 143, 190)hsl(201, 55%, 48%)oklch(0.618 0.109 235.9)Colors that go with #378fbe
Charcoal, Crimson and Copper 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 #378fbe: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #378fbe: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Copper #b87333
complementaryshippedCopper sits directly opposite #378fbe on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #378fbe in 5 real palettes, including Beach Hut and Wired's brand system, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #378fbe: 7 real palettes, including Hershey's's brand system and Glacier, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #378fbe: 6 real palettes, including Astro's brand system and Deep Water, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #378fbe: 17 real palettes, including Gopro's brand system and American Express's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #378fbe in 4 real palettes, including Ledger Dark and Sapphire & Gold, as the lead colour.
Real palettes that use #378fbe
Tints & shades
Harmonies
Contrast
| #378fbe as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.6:1 | fail | pass | fail | |
Aaon black | 5.83:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #378fbe 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
#378fbe reads as cool, modern. 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 #378fbe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/378fbe-9cb1c4-df4e62-1f222d-e9f1f0?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