First Snow
Open in tool →Ice blue on snow-white with a deep navy — the quietest winter palette; everything is a tint of one cold hue.
Color
#1d4e7c
#1d4e7c
hex
#1d4e7crgb
rgb(29, 78, 124)hsl
hsl(209, 62%, 30%)oklch
oklch(0.415 0.093 249.9)Closest name: Assassin (#2d4f83)Relative luminance 0.0717
Colors that go with #1d4e7c
Crimson, Blue and Cadet 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.
Crimson #dc143c
triadicshippedCrimson completes a triad with #1d4e7c — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blue #0000ff
shipped7 real palettes, including CVS's brand system and Alaska Airlines's brand system put Blue beside #1d4e7c, as the supporting colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #1d4e7c: 4 real palettes, including Dusk and Open House, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #1d4e7c: 4 real palettes, including Blue Mono and Blizzard's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #1d4e7c: 15 real palettes, including Unilever's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #1d4e7c in 5 real palettes, including Sapphire & Gold and Disney's brand system, as the supporting colour.
Midnight Blue #191970
shipped20 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #1d4e7c, as that palette's text colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #1d4e7c: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #1d4e7c
Tints & shades
Harmonies
Contrast
| #1d4e7c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.63:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.43:1 | 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 #1d4e7c 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
#1d4e7c reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #1d4e7c
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 #1d4e7c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/1d4e7c-9cacc4-df4e4e-1f212d-e9f1f1?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