Nearest named color: Signal Blue
#1685F3
#1685F3
Nearest named
Signal Blue
Family
Blue
Lightness
61.9%
Chroma
0.188
Hue angle
254.0°
Temperature
Cool
Contrast on white
3.70:1 · AA Large
Contrast on black
5.03:1 · AA
Web-safe
#0099FF
CSS oklch()
62% 0.19 254

#1685F3 is a mid-toned, cool indigo. On the Color Lab it reads clean and engineered, bold and ownable. It carries a legible label as a UI accent and sits well as a supporting tone.

Palettes built on #1685F3

Not just a swatch — here's how #1685F3 works with other colors. Named schemes with #1685F3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Signal Blue.

Coastal Morning Lead · 5 colors

Signal Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Berry & Cream Lead · 5 colors

Signal Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Signal Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Signal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Signal Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #1685F3 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 4/100
Cool
Reads cool and recessive — calming, technical, good for trust-led UI.
Softness 40/100
Moderate
Middle-weight — neither delicate nor heavy.
Depth 40/100
Moderate
Mid depth — usable as an accent or a muted ground.
Naturalness 0/100
Very low
Reads engineered rather than organic — synthetic, digital.
Vintage feel 26/100
Low
A faint retro warmth without tipping into sepia.
Luxury 42/100
Moderate
Understated — leans refined without going austere.
Brand distinctiveness 73/100
High
Bold and ownable — memorable as a primary brand color.
UI accent fit 79/100
High
Strong interactive accent — visible and can carry a legible label.
Surface fit 19/100
Very low
Too saturated or mid-toned for big areas — keep it to accents.
Print safety 61/100
High
Prints close, with a slight loss of vibrancy.

Pairs with #1685F3

For UI
For branding
For interior
For fashion
People also use #1685F3 with

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA
Body text Do not use for body copy on light surfaces. Avoid
Large display Fine for headings 24px+ on white. Pass
Background Pair with #141310 text at 5.0:1. Use
Subtle surface Use #D7E7F6 for cards and hover fills. Tint 80
Avoid beside #163BF3 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #1685F3 at work across the surfaces designers actually ship.

Website / UI
Northwind Sign up
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Dashboard
Revenue
$48.2k ▲ 12%
Brand
AVELINE
Studio
Poster
Nov 14 · 8PM
NIGHT
MARKET
Packaging
BLOOM
Botanical Wash
250 ml
Interior

Scales

ShadesBase darkened in 10% steps
TintsBase lifted toward white
TonesSaturation removed, lightness held
Monochromatic scaleDesign-system ready, 50–900

Every model

Export

:root {
  --color-base: #1685F3;
  --color-base-rgb: 22 133 243;
  --color-base-oklch: oklch(61.9% 0.188 254.0);
  --color-50: #F0F7FE;
  --color-100: #D8EBFD;
  --color-200: #B2D6FB;
  --color-300: #7EB8F2;
  --color-400: #4F99E3;
  --color-500: #2B7ACA;
  --color-600: #296199;
  --color-700: #23476C;
  --color-800: #1B3046;
  --color-900: #121F2B;
  --color-on-base: #141310;
}