Color
#306fa6
#306fa6rgb(48, 111, 166)hsl(208, 55%, 42%)oklch(0.527 0.108 247.9)Colors that go with #306fa6
Charcoal, Crimson 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 #306fa6: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #306fa6 — 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 #306fa6 in 7 real palettes, including Lemon Squeezy's brand system and Wired's brand system, as the lead colour.
Blue #0000ff
shipped6 real palettes, including Pixar's brand system and CVS's brand system put Blue beside #306fa6, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #306fa6: 7 real palettes, including Fintech Trust and Glacier, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #306fa6: 4 real palettes, including Dusk and Notion's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #306fa6: 4 real palettes, including Deep Water and Astro's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #306fa6: 4 real palettes, including AT&T's brand system and Wendy's's brand system, as the accent.
Real palettes that use #306fa6
Tints & shades
Harmonies
Contrast
| #306fa6 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.32:1 | pass | pass | fail |
|
Aaon black | 3.95:1 | 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 #306fa6 as the background.
Brands using this color
Fonts for this mood
#306fa6 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 #306fa6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/306fa6-9cadc4-df4e51-1f212d-e9f1f1?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