What color is #384BBB?

#384BBB is a medium blue. In RGB it is rgb(56, 75, 187), and in HSL hsl(231, 54%, 48%).

Is #384BBB accessible as text?

On white, #384BBB has a contrast ratio of 7.26:1 (passes WCAG AA for body text); on black it is 2.89:1 (fails). For text placed on #384BBB, use white for the best readability.

What is the closest Tailwind color to #384BBB?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #384BBB?

#384BBB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BCA938. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #384BBB below.

Is #384BBB good for buttons?

#384BBB works well for buttons and highlights, but use white text on #384BBB — black text only reaches 2.89:1, below the 4.5:1 needed for normal-size labels.

Is #384BBB the same as CSS darkslateblue?

No — #384BBB is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#384BBB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #384BBB

Not just a swatch — here's how #384BBB works with other colors. Named schemes with #384BBB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #384BBB Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Cerulean 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

Signal #384BBB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5A73DA

Cerulean is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Cerulean.

Vintage Leather Lead · 5 colors

Lead #384BBB Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Cerulean 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

Lead #384BBB Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #384BBB Secondary #7481A8 Support #9D8F88 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #384BBB 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 12/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

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 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 56/100

Moderate

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 89/100

Very high

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

Surface fit 10/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #384BBB

For UI

For branding

For interior

For fashion

People also use #384BBB with

Carolina Blue Grape Brass Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

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 7.3:1. Use

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

Avoid beside #5138BC — 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 #384BBB 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: #384BBB;
  --color-base-rgb: 56 75 187;
  --color-base-oklch: oklch(46.8% 0.177 270.6);
  --color-50: #F3F4FC;
  --color-100: #DFE2F6;
  --color-200: #C0C7EC;
  --color-300: #959FDA;
  --color-400: #6C7AC6;
  --color-500: #4B59AA;
  --color-600: #3F4983;
  --color-700: #32385D;
  --color-800: #23273D;
  --color-900: #171926;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F3F4FC',
    100: '#DFE2F6',
    200: '#C0C7EC',
    300: '#959FDA',
    400: '#6C7AC6',
    500: '#4B59AA',
    600: '#3F4983',
    700: '#32385D',
    800: '#23273D',
    900: '#171926',
  },
}

$base: #384BBB;
$base-ink: #FFFFFF;
$base-50: #F3F4FC;
$base-100: #DFE2F6;
$base-200: #C0C7EC;
$base-300: #959FDA;
$base-400: #6C7AC6;
$base-500: #4B59AA;
$base-600: #3F4983;
$base-700: #32385D;
$base-800: #23273D;
$base-900: #171926;
$base-hover: #2D3D97;
$base-subtle: #C7CCE8;

{
    "color": {
        "base": {
            "value": "#384BBB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F4FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE2F6",
                "type": "color"
            },
            "200": {
                "value": "#C0C7EC",
                "type": "color"
            },
            "300": {
                "value": "#959FDA",
                "type": "color"
            },
            "400": {
                "value": "#6C7AC6",
                "type": "color"
            },
            "500": {
                "value": "#4B59AA",
                "type": "color"
            },
            "600": {
                "value": "#3F4983",
                "type": "color"
            },
            "700": {
                "value": "#32385D",
                "type": "color"
            },
            "800": {
                "value": "#23273D",
                "type": "color"
            },
            "900": {
                "value": "#171926",
                "type": "color"
            }
        }
    }
}

Palettes built on #384BBB

Color Lab

Pairs with #384BBB

UI roles & guardrails

In real applications

Scales

Every model

Export