Color
#307fa6
#307fa6rgb(48, 127, 166)hsl(200, 55%, 42%)oklch(0.566 0.097 233.8)Colors that go with #307fa6
Charcoal, Crimson and Royal 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 #307fa6: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #307fa6: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Royal Blue #4169e1
analogousshippedRoyal Blue is #307fa6's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #307fa6 in 7 real palettes, including Beach Hut and Wired's brand system, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #307fa6: 7 real palettes, including Glacier and Hershey's's brand system, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #307fa6: 4 real palettes, including Notion's brand system and Riverbed.
Denim #1560bd
shippedDesigners have shipped Denim with #307fa6: 12 real palettes, including Discover's brand system and Capital One's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #307fa6: 4 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour.
Real palettes that use #307fa6
Tints & shades
Harmonies
Contrast
| #307fa6 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.46:1 | fail | pass | fail | |
Aaon black | 4.71:1 | 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 #307fa6 as the background.
Brands using this color
Fonts for this mood
#307fa6 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 #307fa6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/307fa6-9cb2c4-df4e64-1f232d-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