Nearest named color: True Blue
#1773BF
#1773BF
Nearest named
True Blue
Family
Blue
Lightness
54.5%
Chroma
0.143
Hue angle
249.7°
Temperature
Cool
Contrast on white
4.95:1 · AA
Contrast on black
3.75:1 · AA Large
Web-safe
#0066CC
CSS oklch()
54% 0.14 250

#1773BF is a mid-toned, cool indigo. On the Color Lab it reads clean and engineered. It carries a legible label as a UI accent and sits well as a supporting tone.

Palettes built on #1773BF

Not just a swatch — here's how #1773BF works with other colors. Named schemes with #1773BF in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

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

Tech Product Signal · 5 colors

True 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 True Blue.

Vintage Leather Lead · 5 colors

True Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

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

Minimal Editorial Surface · 5 colors

True 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 True Blue carrying the quiet middle.

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Color Lab

How #1773BF 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 10/100
Cool
Reads cool and recessive — calming, technical, good for trust-led UI.
Softness 41/100
Moderate
Middle-weight — neither delicate nor heavy.
Depth 47/100
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 43/100
Moderate
A faint retro warmth without tipping into sepia.
Luxury 51/100
Moderate
Understated — leans refined without going austere.
Brand distinctiveness 39/100
Low
Recognisable but shares space with nearby hues.
UI accent fit 100/100
Very high
Strong interactive accent — visible and can carry a legible label.
Surface fit 13/100
Very low
Too saturated or mid-toned for big areas — keep it to accents.
Print safety 69/100
High
Prints close, with a slight loss of vibrancy.

Pairs with #1773BF

For UI
For branding
For interior
For fashion
People also use #1773BF with

UI roles & guardrails

Primary action Safe as a filled button with white label. AA
Body text Passes on white at 16px and above. Pass
Large display Fine for headings 24px+ on white. Pass
Background Pair with white text at 5.0:1. Use
Subtle surface Use #D1E3F2 for cards and hover fills. Tint 80
Avoid beside #163BC0 — 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 #1773BF 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: #1773BF;
  --color-base-rgb: 23 115 191;
  --color-base-oklch: oklch(54.5% 0.143 249.7);
  --color-50: #F1F8FE;
  --color-100: #DAECFC;
  --color-200: #B6D9F6;
  --color-300: #85BDEB;
  --color-400: #58A0DA;
  --color-500: #3581C0;
  --color-600: #306692;
  --color-700: #284B67;
  --color-800: #1D3243;
  --color-900: #142029;
  --color-on-base: #FFFFFF;
}