Color
#399bd0
#399bd0rgb(57, 155, 208)hsl(201, 62%, 52%)oklch(0.656 0.119 236.6)Colors that go with #399bd0
Charcoal, Amber and Blue 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 #399bd0: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #399bd0 in 8 real palettes, including Beach Hut and Salesforce's brand system, as the supporting colour.
Blue #0000ff
shipped4 real palettes, including Qualcomm's brand system and Unity's brand system put Blue beside #399bd0, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #399bd0: 4 real palettes, including Blue Mono and Hershey's's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #399bd0 in 4 real palettes, including NASCAR's brand system and Diner, as the supporting colour.
Dark Orange #ff8c00
shippedDark Orange shows up next to #399bd0 in 4 real palettes, including Elastic's brand system and Learning App, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #399bd0: 5 real palettes, including Snowflake AI Data Cloud's brand system and Remix's brand system, as the supporting colour.
Tomato #ff6347
split-complementshippedTomato is a split-complement of #399bd0: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #399bd0
Tints & shades
Harmonies
Contrast
| #399bd0 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.1:1 | fail | pass | fail | |
Aaon black | 6.77:1 | 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 #399bd0 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#399bd0 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 #399bd0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/399bd0-9cb1c4-df4e62-1f222d-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