Beach Hut
Open in tool →Sea blue with sun-bleached yellow and a coral — striped-canvas summer, softened so it works on a screen.
Color
#398bb1
#398bb1
hex
#398bb1rgb
rgb(57, 139, 177)hsl
hsl(199, 51%, 46%)oklch
oklch(0.603 0.097 231.7)Closest name: Blue Moon (#3992a8)Relative luminance 0.2251
Colors that go with #398bb1
Charcoal, Copper and Crimson 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 #398bb1: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #398bb1 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #398bb1: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #398bb1 in 7 real palettes, including Beach Hut and Wired's brand system, as the supporting colour.
Blue #0000ff
shipped4 real palettes, including Qualcomm's brand system and Readymag's brand system put Blue beside #398bb1, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #398bb1: 6 real palettes, including Hershey's's brand system and Glacier, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #398bb1: 7 real palettes, including Telegram's brand system and Deep Water, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #398bb1: 17 real palettes, including Gopro's brand system and Discover's brand system, as the lead colour.
Real palettes that use #398bb1
Tints & shades
Harmonies
Contrast
| #398bb1 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.82:1 | fail | pass | fail | |
Aaon black | 5.5:1 | 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 #398bb1 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#398bb1 reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #398bb1
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #398bb1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/398bb1-9cb3c4-df4e66-1f232d-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