What color is #3783EE?

#3783EE is a medium, vivid blue. In RGB it is rgb(55, 131, 238), and in HSL hsl(215, 84%, 57%).

Is #3783EE accessible as text?

On white, #3783EE has a contrast ratio of 3.72:1 (fails WCAG AA for body text); on black it is 5.64:1 (passes). For text placed on #3783EE, use black for the best readability.

What is the closest Tailwind color to #3783EE?

The nearest Tailwind CSS token is blue-500 (#2B7FFF).

What colors go well with #3783EE?

#3783EE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EDA135. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3783EE below.

Is #3783EE good for buttons?

#3783EE works well for buttons and highlights, but use black text on #3783EE — white text only reaches 3.72:1, below the 4.5:1 needed for normal-size labels.

Is #3783EE the same as CSS dodgerblue?

No — #3783EE is not the CSS named color dodgerblue, but dodgerblue (#1E90FF) is the closest CSS named color.

#3783EE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3783EE

Not just a swatch — here's how #3783EE works with other colors. Named schemes with #3783EE in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3783EE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Signal Blue 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 #3783EE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #66AAFF

Signal 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 Signal Blue.

Vintage Leather Lead · 5 colors

Lead #3783EE Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223B

Signal Blue 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 #3783EE Surface #EDE9D6 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #3783EE Secondary #98B2D9 Support #9D8F89 Ink #16140F

Signal 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 Signal Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3783EE 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 6/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 42/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 83/100

Very high

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

Surface fit 19/100

Very low

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

Print safety 65/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3783EE

For UI

For branding

For interior

For fashion

People also use #3783EE with

Electric Blue Han Purple Butterscotch 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 5.0:1. Use

Subtle surface Use #DCE7F6 for cards and hover fills. Tint 80

Avoid beside #3545ED — 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 #3783EE 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

Every model

Export

:root {
  --color-base: #3783EE;
  --color-base-rgb: 55 131 238;
  --color-base-oklch: oklch(61.9% 0.178 257.7);
  --color-50: #F0F6FE;
  --color-100: #D8E8FD;
  --color-200: #B4D1F8;
  --color-300: #81AFEE;
  --color-400: #538DDF;
  --color-500: #306EC4;
  --color-600: #2D5895;
  --color-700: #254269;
  --color-800: #1C2D45;
  --color-900: #131D2A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  signal-blue: {
    50: '#F0F6FE',
    100: '#D8E8FD',
    200: '#B4D1F8',
    300: '#81AFEE',
    400: '#538DDF',
    500: '#306EC4',
    600: '#2D5895',
    700: '#254269',
    800: '#1C2D45',
    900: '#131D2A',
  },
}

$base: #3783EE;
$base-ink: #141310;
$base-50: #F0F6FE;
$base-100: #D8E8FD;
$base-200: #B4D1F8;
$base-300: #81AFEE;
$base-400: #538DDF;
$base-500: #306EC4;
$base-600: #2D5895;
$base-700: #254269;
$base-800: #1C2D45;
$base-900: #131D2A;
$base-hover: #1364D6;
$base-subtle: #C9DBF3;

{
    "color": {
        "base": {
            "value": "#3783EE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E8FD",
                "type": "color"
            },
            "200": {
                "value": "#B4D1F8",
                "type": "color"
            },
            "300": {
                "value": "#81AFEE",
                "type": "color"
            },
            "400": {
                "value": "#538DDF",
                "type": "color"
            },
            "500": {
                "value": "#306EC4",
                "type": "color"
            },
            "600": {
                "value": "#2D5895",
                "type": "color"
            },
            "700": {
                "value": "#254269",
                "type": "color"
            },
            "800": {
                "value": "#1C2D45",
                "type": "color"
            },
            "900": {
                "value": "#131D2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #3783EE

Color Lab

Pairs with #3783EE

UI roles & guardrails

In real applications

Scales

Every model

Export