What color is #1809EF?

#1809EF is a medium, vivid blue. In RGB it is rgb(24, 9, 239), and in HSL hsl(244, 93%, 49%).

Is #1809EF accessible as text?

On white, #1809EF has a contrast ratio of 9.03:1 (passes WCAG AA for body text); on black it is 2.32:1 (fails). For text placed on #1809EF, use white for the best readability.

What is the closest Tailwind color to #1809EF?

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

What colors go well with #1809EF?

#1809EF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E2F109. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1809EF below.

Is #1809EF good for buttons?

#1809EF works well for buttons and highlights, but use white text on #1809EF — black text only reaches 2.32:1, below the 4.5:1 needed for normal-size labels.

Is #1809EF the same as CSS blue?

No — #1809EF is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#1809EF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1809EF

Not just a swatch — here's how #1809EF works with other colors. Named schemes with #1809EF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #1809EF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #2E59FF

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 Blue.

Coastal Morning Lead · 5 colors

Lead #1809EF Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Blue 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 #1809EF Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Blue 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 #1809EF Secondary #5D77B7 Support #9D8F88 Ink #18140F

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 Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #1809EF Secondary #E86A74 Accent #F79251 Anchor #573B58 Surface #F7E7D7

Blue 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 #1809EF 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 10/100

Cool

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

Softness 19/100

Very low

Firm and assertive — carries weight and contrast.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 0/100

Very low

Clean and current — no dusty, aged cast.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 34/100

Low

Workable accent with care around contrast.

Surface fit 12/100

Very low

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

Print safety 47/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #1809EF

For UI

For branding

For interior

For fashion

People also use #1809EF with

Dodger Blue Blue Violet Citrine 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 9.0:1. Use

Subtle surface Use #D6D4F6 for cards and hover fills. Tint 80

Avoid beside #6609F1 — 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 #1809EF 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: #1809EF;
  --color-base-rgb: 24 9 239;
  --color-base-oklch: oklch(43.8% 0.293 266.3);
  --color-50: #F1F0FE;
  --color-100: #DAD8FD;
  --color-200: #B6B1FC;
  --color-300: #847CF4;
  --color-400: #564CE6;
  --color-500: #3329CC;
  --color-600: #2F279B;
  --color-700: #27226D;
  --color-800: #1D1A47;
  --color-900: #14122B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  blue: {
    50: '#F1F0FE',
    100: '#DAD8FD',
    200: '#B6B1FC',
    300: '#847CF4',
    400: '#564CE6',
    500: '#3329CC',
    600: '#2F279B',
    700: '#27226D',
    800: '#1D1A47',
    900: '#14122B',
  },
}

$base: #1809EF;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DAD8FD;
$base-200: #B6B1FC;
$base-300: #847CF4;
$base-400: #564CE6;
$base-500: #3329CC;
$base-600: #2F279B;
$base-700: #27226D;
$base-800: #1D1A47;
$base-900: #14122B;
$base-hover: #1307C1;
$base-subtle: #C0BCF4;

{
    "color": {
        "base": {
            "value": "#1809EF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DAD8FD",
                "type": "color"
            },
            "200": {
                "value": "#B6B1FC",
                "type": "color"
            },
            "300": {
                "value": "#847CF4",
                "type": "color"
            },
            "400": {
                "value": "#564CE6",
                "type": "color"
            },
            "500": {
                "value": "#3329CC",
                "type": "color"
            },
            "600": {
                "value": "#2F279B",
                "type": "color"
            },
            "700": {
                "value": "#27226D",
                "type": "color"
            },
            "800": {
                "value": "#1D1A47",
                "type": "color"
            },
            "900": {
                "value": "#14122B",
                "type": "color"
            }
        }
    }
}

Palettes built on #1809EF

Color Lab

Pairs with #1809EF

UI roles & guardrails

In real applications

Scales

Every model

Export