Color
#3c79fb
#3c79fbrgb(60, 121, 251)hsl(221, 96%, 61%)oklch(0.609 0.205 262.9)Colors that go with #3c79fb
Charcoal, Crimson and Copper 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 #3c79fb: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #3c79fb — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Copper #b87333
complementaryshippedCopper sits directly opposite #3c79fb 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 #3c79fb in 9 real palettes, including Google's brand system and Mastodon hosted on mastodon.social's brand system, as the accent.
Blue #0000ff
shipped13 real palettes, including Penpot's brand system and Cargo's brand system put Blue beside #3c79fb, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #3c79fb: 10 real palettes, including Behance's brand system and Carrefour's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #3c79fb: 9 real palettes, including Elastic's brand system and Patreon's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3c79fb: 17 real palettes, including Coursera's brand system and Fivetran blue's brand system, as the accent.
Real palettes that use #3c79fb
Tints & shades
Harmonies
Contrast
| #3c79fb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.95:1 | fail | pass | fail | |
Aaon black | 5.32:1 | 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 #3c79fb as the background.
Brands using this color
Fonts for this mood
#3c79fb reads as cool, vivid, technical. 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 #3c79fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3c79fb-9ca4c4-df6b4e-211f2d-e9eff1?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