Nearest named color: Carolina Blue
#6597CD
#6597CD
Nearest named
Carolina Blue
Family
Blue
Lightness
66.3%
Chroma
0.097
Hue angle
251.3°
Temperature
Cool
Contrast on white
3.06:1 · AA Large
Contrast on black
6.07:1 · AA
Web-safe
#6699CC
CSS oklch()
66% 0.10 251

#6597CD 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 reproduces cleanly in print.

Palettes built on #6597CD

Not just a swatch — here's how #6597CD works with other colors. Named schemes with #6597CD in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

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

Nordic Calm Accent · 5 colors

Carolina Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Carolina 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 Carolina Blue.

Minimal Editorial Surface · 5 colors

Carolina 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 Carolina Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Carolina Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Build a working theme in the generator →

Color Lab

How #6597CD 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 23/100
Cool
Reads cool and recessive — calming, technical, good for trust-led UI.
Softness 55/100
Moderate
Middle-weight — neither delicate nor heavy.
Depth 33/100
Low
Mid depth — usable as an accent or a muted ground.
Naturalness 0/100
Very low
Reads engineered rather than organic — synthetic, digital.
Vintage feel 49/100
Moderate
A faint retro warmth without tipping into sepia.
Luxury 41/100
Moderate
Understated — leans refined without going austere.
Brand distinctiveness 38/100
Low
Recognisable but shares space with nearby hues.
UI accent fit 68/100
High
Strong interactive accent — visible and can carry a legible label.
Surface fit 38/100
Low
Usable as a tinted surface in measured doses.
Print safety 79/100
High
Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6597CD

For UI
For branding
For interior
For fashion
People also use #6597CD 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 6.1:1. Use
Subtle surface Use #E3EAF2 for cards and hover fills. Tint 80
Avoid beside #6575CD — 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 #6597CD at work across the surfaces designers actually ship.

Website / UI
Northwind Sign up
Build faster.
A working theme, generated in seconds.
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: #6597CD;
  --color-base-rgb: 101 151 205;
  --color-base-oklch: oklch(66.3% 0.097 251.3);
  --color-50: #F3F7FC;
  --color-100: #E0EAF6;
  --color-200: #C1D6EB;
  --color-300: #97B7D9;
  --color-400: #6F98C3;
  --color-500: #4E79A7;
  --color-600: #416081;
  --color-700: #33475C;
  --color-800: #24303D;
  --color-900: #181E26;
  --color-on-base: #141310;
}