What color is #3997BC?

#3997BC is a medium cyan-blue. In RGB it is rgb(57, 151, 188), and in HSL hsl(197, 53%, 48%).

Is #3997BC accessible as text?

On white, #3997BC has a contrast ratio of 3.32:1 (fails WCAG AA for body text); on black it is 6.33:1 (passes). For text placed on #3997BC, use black for the best readability.

What is the closest Tailwind color to #3997BC?

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

What colors go well with #3997BC?

#3997BC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BB5E3A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3997BC below.

Is #3997BC good for buttons?

#3997BC works well for buttons and highlights, but use black text on #3997BC — white text only reaches 3.32:1, below the 4.5:1 needed for normal-size labels.

Is #3997BC the same as CSS steelblue?

No — #3997BC is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#3997BC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3997BC

Not just a swatch — here's how #3997BC works with other colors. Named schemes with #3997BC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3997BC 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 #3997BC 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 #3997BC Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #6DBCDE

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 #3997BC Secondary #9FBBC9 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 #3997BC 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 #3997BC 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 20/100

Cool

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

Softness 53/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

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 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 40/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 77/100

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 #3997BC

For UI

For branding

For interior

For fashion

People also use #3997BC with

Medium Aquamarine Cerulean Burnt Orange 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 5.6:1. Use

Subtle surface Use #DAE9EF for cards and hover fills. Tint 80

Avoid beside #3A6BBB — 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 #3997BC 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: #3997BC;
  --color-base-rgb: 57 151 188;
  --color-base-oklch: oklch(63.7% 0.103 228.0);
  --color-50: #F3F9FC;
  --color-100: #DFF0F6;
  --color-200: #C1E0EC;
  --color-300: #95C6DA;
  --color-400: #6DACC5;
  --color-500: #4C8FA9;
  --color-600: #406F82;
  --color-700: #32515D;
  --color-800: #24363D;
  --color-900: #172226;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F3F9FC',
    100: '#DFF0F6',
    200: '#C1E0EC',
    300: '#95C6DA',
    400: '#6DACC5',
    500: '#4C8FA9',
    600: '#406F82',
    700: '#32515D',
    800: '#24363D',
    900: '#172226',
  },
}

$base: #3997BC;
$base-ink: #141310;
$base-50: #F3F9FC;
$base-100: #DFF0F6;
$base-200: #C1E0EC;
$base-300: #95C6DA;
$base-400: #6DACC5;
$base-500: #4C8FA9;
$base-600: #406F82;
$base-700: #32515D;
$base-800: #24363D;
$base-900: #172226;
$base-hover: #2E7896;
$base-subtle: #C7DEE7;

{
    "color": {
        "base": {
            "value": "#3997BC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DFF0F6",
                "type": "color"
            },
            "200": {
                "value": "#C1E0EC",
                "type": "color"
            },
            "300": {
                "value": "#95C6DA",
                "type": "color"
            },
            "400": {
                "value": "#6DACC5",
                "type": "color"
            },
            "500": {
                "value": "#4C8FA9",
                "type": "color"
            },
            "600": {
                "value": "#406F82",
                "type": "color"
            },
            "700": {
                "value": "#32515D",
                "type": "color"
            },
            "800": {
                "value": "#24363D",
                "type": "color"
            },
            "900": {
                "value": "#172226",
                "type": "color"
            }
        }
    }
}

Palettes built on #3997BC

Color Lab

Pairs with #3997BC

UI roles & guardrails

In real applications

Scales

Every model

Export