Color
#306e97
#306e97rgb(48, 110, 151)hsl(204, 52%, 39%)oklch(0.516 0.091 240.7)Colors that go with #306e97
Charcoal, Royal Blue 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 #306e97: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #306e97'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 #306e97 in 7 real palettes, including Lemon Squeezy's brand system and Wired's brand system, as the lead colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #306e97: 6 real palettes, including Fintech Trust and Glacier, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #306e97 in 12 real palettes, including Amazon's brand system and Retro Pop, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #306e97: 6 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #306e97 in 4 real palettes, including Open House and Sapphire & Gold, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #306e97 in 5 real palettes, including Fintech Trust and Indigo SaaS, as the accent.
Real palettes that use #306e97
Tints & shades
Harmonies
Contrast
| #306e97 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.52:1 | pass | pass | fail |
|
Aaon black | 3.8:1 | 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 #306e97 as the background.
Brands using this color
Fonts for this mood
#306e97 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 #306e97 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/306e97-9cafc4-df4e5a-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