Sapphire & Gold
Open in tool →Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest.
Color
#23378b
#23378b
hex
#23378brgb
rgb(35, 55, 139)hsl
hsl(228, 60%, 34%)oklch
oklch(0.376 0.142 268.4)Closest name: Deep Space Royal (#223382)Relative luminance 0.0495
Colors that go with #23378b
Charcoal, Steel Blue 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 #23378b: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #23378b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped4 real palettes, including Procter & Gamble's brand system and CVS's brand system put Blue beside #23378b, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #23378b in 11 real palettes, including Casper Sleep's brand system and Walgreens's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #23378b: 15 real palettes, including Warbyparker's brand system and Unilever's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #23378b: 4 real palettes, including Nintendo's brand system and MLB's brand system, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #23378b in 12 real palettes, including Nokia's brand system and Nivea's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #23378b in 4 real palettes, including Gillette's brand system and Boeing's brand system, as the lead colour.
Real palettes that use #23378b
Tints & shades
Harmonies
Contrast
| #23378b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.55:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.99:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #23378b as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#23378b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #23378b
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 #23378b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/23378b-9c9fc4-df7c4e-231f2d-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