What color is #399AC0?

#399AC0 is a medium cyan-blue. In RGB it is rgb(57, 154, 192), and in HSL hsl(197, 54%, 49%).

Is #399AC0 accessible as text?

On white, #399AC0 has a contrast ratio of 3.20:1 (fails WCAG AA for body text); on black it is 6.56:1 (passes). For text placed on #399AC0, use black for the best readability.

What is the closest Tailwind color to #399AC0?

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

What colors go well with #399AC0?

#399AC0 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C06039. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #399AC0 below.

Is #399AC0 good for buttons?

#399AC0 works well for buttons and highlights, but use black text on #399AC0 — white text only reaches 3.20:1, below the 4.5:1 needed for normal-size labels.

Is #399AC0 the same as CSS cadetblue?

No — #399AC0 is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#399AC0 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #399AC0

Not just a swatch — here's how #399AC0 works with other colors. Named schemes with #399AC0 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #399AC0 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Bondi 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

Accent #399AC0 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Bondi 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

Signal #399AC0 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #6DBFE2

Bondi 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 Bondi Blue.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #399AC0 Secondary #A2BECC Support #969386 Ink #16140F

Bondi 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 Bondi Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #399AC0 Anchor #372C1D Surface #EBE5D0 Accent #7C9D75 Secondary #393933

Bondi 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 #399AC0 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 19/100

Cool

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

Softness 53/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 35/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 47/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 75/100

High

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

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #399AC0

For UI

For branding

For interior

For fashion

People also use #399AC0 with

Medium Aquamarine Cerulean Tawny Platinum 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 5.8:1. Use

Subtle surface Use #DBE9EF for cards and hover fills. Tint 80

Avoid beside #396DC0 — 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 #399AC0 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: #399AC0;
  --color-base-rgb: 57 154 192;
  --color-base-oklch: oklch(64.6% 0.105 228.0);
  --color-50: #F3F9FC;
  --color-100: #DFF0F6;
  --color-200: #C0E0EC;
  --color-300: #95C7DA;
  --color-400: #6CACC6;
  --color-500: #4B8FAA;
  --color-600: #3F6F83;
  --color-700: #32515D;
  --color-800: #23363D;
  --color-900: #172226;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F3F9FC',
    100: '#DFF0F6',
    200: '#C0E0EC',
    300: '#95C7DA',
    400: '#6CACC6',
    500: '#4B8FAA',
    600: '#3F6F83',
    700: '#32515D',
    800: '#23363D',
    900: '#172226',
  },
}

$base: #399AC0;
$base-ink: #141310;
$base-50: #F3F9FC;
$base-100: #DFF0F6;
$base-200: #C0E0EC;
$base-300: #95C7DA;
$base-400: #6CACC6;
$base-500: #4B8FAA;
$base-600: #3F6F83;
$base-700: #32515D;
$base-800: #23363D;
$base-900: #172226;
$base-hover: #2E7B9A;
$base-subtle: #C8DFE8;

{
    "color": {
        "base": {
            "value": "#399AC0",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DFF0F6",
                "type": "color"
            },
            "200": {
                "value": "#C0E0EC",
                "type": "color"
            },
            "300": {
                "value": "#95C7DA",
                "type": "color"
            },
            "400": {
                "value": "#6CACC6",
                "type": "color"
            },
            "500": {
                "value": "#4B8FAA",
                "type": "color"
            },
            "600": {
                "value": "#3F6F83",
                "type": "color"
            },
            "700": {
                "value": "#32515D",
                "type": "color"
            },
            "800": {
                "value": "#23363D",
                "type": "color"
            },
            "900": {
                "value": "#172226",
                "type": "color"
            }
        }
    }
}

Palettes built on #399AC0

Color Lab

Pairs with #399AC0

UI roles & guardrails

In real applications

Scales

Every model

Export