Color
#3b7cb5
#3b7cb5rgb(59, 124, 181)hsl(208, 51%, 47%)oklch(0.57 0.111 247.6)Colors that go with #3b7cb5
Charcoal, Copper 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 #3b7cb5: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #3b7cb5 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 #3b7cb5 in 10 real palettes, including Wired's brand system and Beach Hut, as the accent.
Blue #0000ff
shipped10 real palettes, including Activision's brand system and Qualcomm's brand system put Blue beside #3b7cb5, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #3b7cb5: 9 real palettes, including Hershey's's brand system and Glacier, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #3b7cb5: 4 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #3b7cb5 in 15 real palettes, including NASCAR's brand system and Retro Pop, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #3b7cb5: 6 real palettes, including Astro's brand system and Deep Water, as the supporting colour.
Real palettes that use #3b7cb5
Tints & shades
Harmonies
Contrast
| #3b7cb5 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.43:1 | fail | pass | fail | |
Aaon black | 4.74:1 | 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 #3b7cb5 as the background.
Brands using this color
Fonts for this mood
#3b7cb5 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 #3b7cb5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3b7cb5-9cadc4-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