#151515
#4E4E4E
#577AFF
#FAFAFA
#0F172AInk
#444F64Graphite
#6366F1Royal Blue
#F8FAFCSnow
Indigo Signal is a monochromatic color palette tagged tech, dark, minimal. A monochromatic set: the same hue family from Ink down to Snow. Saturation is moderate, which keeps it flexible for both interfaces and print. The overall temperature is cool.
Color codes click any value to copy
| Swatch | Name | HEX | RGB | HSL | OKLCH |
|---|---|---|---|---|---|
| Ink | #0F172A | rgb(15, 23, 42) | hsl(222, 47%, 11%) | oklch(20.8% 0.040 266) | |
| Graphite | #444F64 | rgb(68, 79, 100) | hsl(219, 19%, 33%) | oklch(42.7% 0.038 263) | |
| Royal Blue | #6366F1 | rgb(99, 102, 241) | hsl(239, 84%, 67%) | oklch(58.5% 0.204 277) | |
| Snow | #F8FAFC | rgb(248, 250, 252) | hsl(210, 40%, 98%) | oklch(98.4% 0.003 248) |
Why it works and how to use it
With 3 chromatic colors, Royal Blue takes the lead while the rest support. Lightness runs from 11% to 98%. Well suited to a SaaS landing page or dashboard.
- Background: Snow (#F8FAFC) is the lightest color, so it belongs on large surfaces.
- Text: Ink (#0F172A) on #F8FAFC gives 17.06:1, passing WCAG AAA.
- Primary: Royal Blue (#6366F1) is the most saturated mid-tone; use it for buttons and links (4.27:1 against the background, fine for UI elements).
- Accent: Graphite (#444F64) for highlights, badges and hover states.
2 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Ink on Snow at 17.06:1.
Preview on a real UI see how the palette feels in context
BrandFeaturesPricingBlogGet started
Design faster with Indigo Signal
A palette preview that turns four colors into a page, so you can judge hierarchy, contrast and mood before you commit.
Primary action SecondaryCard title
Card title
Card title
Roles are assigned by lightness.
Color blindness simulation
#0F172A
#444F64
#6366F1
#F8FAFC
Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#0F172A on #F8FAFC | Aa | 17.06:1 | AAA |
#444F64 on #F8FAFC | Aa | 7.88:1 | AAA |
#6366F1 on #F8FAFC | Aa | 4.27:1 | AA large only |
#0F172A on #6366F1 | Aa | 4:1 | AA large only |
#0F172A on #444F64 | Aa | 2.17:1 | Fail |
#444F64 on #6366F1 | Aa | 1.84:1 | Fail |
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