Color
#307a8d
#307a8drgb(48, 122, 141)hsl(192, 49%, 37%)oklch(0.542 0.078 217.7)Colors that go with #307a8d
Charcoal, Crimson and Rust 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 #307a8d: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #307a8d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Rust #b7410e
complementaryshippedRust sits directly opposite #307a8d 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 #307a8d in 5 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour.
Blue #0000ff
shipped5 real palettes, including Activision's brand system and Rolex's brand system put Blue beside #307a8d, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #307a8d: 6 real palettes, including Fintech Trust and Glacier, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #307a8d: 5 real palettes, including Riverbed and Dusk, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #307a8d: 5 real palettes, including Deep Water and Venmo's brand system, as the lead colour.
Real palettes that use #307a8d
Tints & shades
Harmonies
Contrast
| #307a8d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.89:1 | pass | pass | fail |
|
Aaon black | 4.29:1 | fail | 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 #307a8d as the background.
Brands using this color
Fonts for this mood
#307a8d 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 #307a8d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/307a8d-a2b5be-df4e77-1f242d-e9f1ef?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