Retro Pop
Open in tool →Fifties-diner red and steel blue with a peach — nostalgic pop that still passes contrast.
Color
#397e9d
#397e9d
hex
#397e9drgb
rgb(57, 126, 157)hsl
hsl(199, 47%, 42%)oklch
oklch(0.562 0.084 230.2)Closest name: Cry Me a River (#427898)Relative luminance 0.1823
Colors that go with #397e9d
Charcoal, Crimson and Royal 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 #397e9d: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #397e9d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Royal Blue #4169e1
analogousshippedRoyal Blue is #397e9d'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 #397e9d in 6 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #397e9d: 6 real palettes, including Glacier and Hershey's's brand system, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #397e9d: 6 real palettes, including Riverbed and Dusk, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #397e9d: 13 real palettes, including Discover's brand system and Capital One's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #397e9d: 4 real palettes, including Wendy's's brand system and AT&T's brand system, as the supporting colour.
Real palettes that use #397e9d
Tints & shades
Harmonies
Contrast
| #397e9d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.52:1 | pass | pass | fail |
|
Aaon black | 4.65:1 | 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 #397e9d 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
#397e9d reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #397e9d
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 #397e9d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/397e9d-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