What color is #1839DC?

#1839DC is a medium, vivid blue. In RGB it is rgb(24, 57, 220), and in HSL hsl(230, 80%, 48%).

Is #1839DC accessible as text?

On white, #1839DC has a contrast ratio of 7.90:1 (passes WCAG AA for body text); on black it is 2.66:1 (fails). For text placed on #1839DC, use white for the best readability.

What is the closest Tailwind color to #1839DC?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #1839DC?

#1839DC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DCBC18. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1839DC below.

Is #1839DC good for buttons?

#1839DC works well for buttons and highlights, but use white text on #1839DC — black text only reaches 2.66:1, below the 4.5:1 needed for normal-size labels.

Is #1839DC the same as CSS blue?

No — #1839DC is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#1839DC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1839DC

Not just a swatch — here's how #1839DC works with other colors. Named schemes with #1839DC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #1839DC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3A6AF9

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

Coastal Morning Lead · 5 colors

Lead #1839DC Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #1839DC Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Ultramarine 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 #1839DC Secondary #677EB3 Support #9D8F88 Ink #18140F

Ultramarine 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 Ultramarine carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #1839DC Secondary #E86A74 Accent #F79251 Anchor #573B58 Surface #F7E7D7

Ultramarine glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #1839DC 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 9/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 60/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 9/100

Very low

Clean and current — no dusty, aged cast.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 95/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 59/100

Moderate

Workable accent with care around contrast.

Surface fit 10/100

Very low

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

Print safety 56/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #1839DC

For UI

For branding

For interior

For fashion

People also use #1839DC with

Picton Blue Han Purple Mustard Yellow 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 7.9:1. Use

Subtle surface Use #D5DAF4 for cards and hover fills. Tint 80

Avoid beside #3918DC — 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 #1839DC 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: #1839DC;
  --color-base-rgb: 24 57 220;
  --color-base-oklch: oklch(45.7% 0.245 265.8);
  --color-50: #F1F3FE;
  --color-100: #D9DFFC;
  --color-200: #B6C1F7;
  --color-300: #8495EB;
  --color-400: #576DDB;
  --color-500: #344BC1;
  --color-600: #2F4093;
  --color-700: #273268;
  --color-800: #1D2444;
  --color-900: #141729;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultramarine: {
    50: '#F1F3FE',
    100: '#D9DFFC',
    200: '#B6C1F7',
    300: '#8495EB',
    400: '#576DDB',
    500: '#344BC1',
    600: '#2F4093',
    700: '#273268',
    800: '#1D2444',
    900: '#141729',
  },
}

$base: #1839DC;
$base-ink: #FFFFFF;
$base-50: #F1F3FE;
$base-100: #D9DFFC;
$base-200: #B6C1F7;
$base-300: #8495EB;
$base-400: #576DDB;
$base-500: #344BC1;
$base-600: #2F4093;
$base-700: #273268;
$base-800: #1D2444;
$base-900: #141729;
$base-hover: #142EB0;
$base-subtle: #BFC7EF;

{
    "color": {
        "base": {
            "value": "#1839DC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F3FE",
                "type": "color"
            },
            "100": {
                "value": "#D9DFFC",
                "type": "color"
            },
            "200": {
                "value": "#B6C1F7",
                "type": "color"
            },
            "300": {
                "value": "#8495EB",
                "type": "color"
            },
            "400": {
                "value": "#576DDB",
                "type": "color"
            },
            "500": {
                "value": "#344BC1",
                "type": "color"
            },
            "600": {
                "value": "#2F4093",
                "type": "color"
            },
            "700": {
                "value": "#273268",
                "type": "color"
            },
            "800": {
                "value": "#1D2444",
                "type": "color"
            },
            "900": {
                "value": "#141729",
                "type": "color"
            }
        }
    }
}

Palettes built on #1839DC

Color Lab

Pairs with #1839DC

UI roles & guardrails

In real applications

Scales

Every model

Export