Mid-Century
Open in tool →Tangerine, teal and mustard on cream — the 1960s lounge trio, one of the few retro palettes with real hue contrast.
Color
#307371
#307371
hex
#307371rgb
rgb(48, 115, 113)hsl
hsl(178, 41%, 32%)oklch
oklch(0.512 0.068 192.6)Closest name: Green Sleeves (#39766c)Relative luminance 0.1408
Colors that go with #307371
Charcoal, Crimson and Champagne 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 #307371: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
complementaryshippedCrimson sits directly opposite #307371 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Champagne #f7e7ce
shipped4 real palettes, including Darkroom and Forest Floor put Champagne beside #307371, as the surface under it.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #307371: 5 real palettes, including Ink & Paper and Intel's brand system, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #307371: 5 real palettes, including Riverbed and Desert Road, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #307371: 11 real palettes, including The New York Times's brand system and Campus, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #307371: 4 real palettes, including Fireside and Wendy's's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #307371 in 4 real palettes, including Mid-Century and Sapphire & Gold, as the accent.
Real palettes that use #307371
Tints & shades
Harmonies
Contrast
| #307371 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.5:1 | pass | pass | fail |
|
Aaon black | 3.82:1 | fail | 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 #307371 as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #307371
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 #307371 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/307371-a2bcbe-d45999-1f282d-e9f1ed?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