What color is #6C99BC?

#6C99BC is a medium cyan-blue. In RGB it is rgb(108, 153, 188), and in HSL hsl(206, 37%, 58%).

Is #6C99BC accessible as text?

On white, #6C99BC has a contrast ratio of 3.03:1 (fails WCAG AA for body text); on black it is 6.92:1 (passes). For text placed on #6C99BC, use black for the best readability.

What is the closest Tailwind color to #6C99BC?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #6C99BC?

#6C99BC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BC8F6C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6C99BC below.

Is #6C99BC good for buttons?

#6C99BC works well for buttons and highlights, but use black text on #6C99BC — white text only reaches 3.03:1, below the 4.5:1 needed for normal-size labels.

Is #6C99BC the same as CSS cadetblue?

No — #6C99BC is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#6C99BC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6C99BC

Not just a swatch — here's how #6C99BC works with other colors. Named schemes with #6C99BC in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #6C99BC Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

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

Coastal Morning Lead · 5 colors

Lead #6C99BC Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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

Japanese Sand Base · 5 colors

Base #6C99BC Surface #ECEADC Highlight #F4F2E7 Secondary #B2B2A0 Ink #2A2823

Carolina Blue sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Tech Product Signal · 5 colors

Signal #6C99BC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #95BEDF

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

Surface #F6F4EF Accent #6C99BC Secondary #B2C1CE Support #969386 Ink #16140F

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.

Build a working theme in the generator →

Color Lab

How #6C99BC 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 29/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 59/100

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 45/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 40/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 28/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 60/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 46/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6C99BC

For UI

For branding

For interior

For fashion

People also use #6C99BC with

Medium Turquoise Very Peri Camel Gainsboro Charcoal

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 #E4EAEF for cards and hover fills. Tint 80

Avoid beside #6C7FBC — 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 #6C99BC at work across the surfaces designers actually ship.

Website / UI

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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

Every model

Export

:root {
  --color-base: #6C99BC;
  --color-base-rgb: 108 153 188;
  --color-base-oklch: oklch(66.4% 0.072 242.5);
  --color-50: #F4F8FA;
  --color-100: #E3ECF3;
  --color-200: #C7D8E5;
  --color-300: #A0BBCF;
  --color-400: #7A9DB8;
  --color-500: #5A7F9B;
  --color-600: #4A6478;
  --color-700: #384956;
  --color-800: #283239;
  --color-900: #1A1F24;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  carolina-blue: {
    50: '#F4F8FA',
    100: '#E3ECF3',
    200: '#C7D8E5',
    300: '#A0BBCF',
    400: '#7A9DB8',
    500: '#5A7F9B',
    600: '#4A6478',
    700: '#384956',
    800: '#283239',
    900: '#1A1F24',
  },
}

$base: #6C99BC;
$base-ink: #141310;
$base-50: #F4F8FA;
$base-100: #E3ECF3;
$base-200: #C7D8E5;
$base-300: #A0BBCF;
$base-400: #7A9DB8;
$base-500: #5A7F9B;
$base-600: #4A6478;
$base-700: #384956;
$base-800: #283239;
$base-900: #1A1F24;
$base-hover: #4B7CA2;
$base-subtle: #D6E0E8;

{
    "color": {
        "base": {
            "value": "#6C99BC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E3ECF3",
                "type": "color"
            },
            "200": {
                "value": "#C7D8E5",
                "type": "color"
            },
            "300": {
                "value": "#A0BBCF",
                "type": "color"
            },
            "400": {
                "value": "#7A9DB8",
                "type": "color"
            },
            "500": {
                "value": "#5A7F9B",
                "type": "color"
            },
            "600": {
                "value": "#4A6478",
                "type": "color"
            },
            "700": {
                "value": "#384956",
                "type": "color"
            },
            "800": {
                "value": "#283239",
                "type": "color"
            },
            "900": {
                "value": "#1A1F24",
                "type": "color"
            }
        }
    }
}

Palettes built on #6C99BC

Color Lab

Pairs with #6C99BC

UI roles & guardrails

In real applications

Scales

Every model

Export