What color is #184BB2?

#184BB2 is a medium, vivid blue. In RGB it is rgb(24, 75, 178), and in HSL hsl(220, 76%, 40%).

Is #184BB2 accessible as text?

On white, #184BB2 has a contrast ratio of 7.81:1 (passes WCAG AA for body text); on black it is 2.69:1 (fails). For text placed on #184BB2, use white for the best readability.

What is the closest Tailwind color to #184BB2?

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

What colors go well with #184BB2?

#184BB2 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B48018. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #184BB2 below.

Is #184BB2 good for buttons?

#184BB2 works well for buttons and highlights, but use white text on #184BB2 — black text only reaches 2.69:1, below the 4.5:1 needed for normal-size labels.

Is #184BB2 the same as CSS darkslateblue?

No — #184BB2 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#184BB2 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #184BB2

Not just a swatch — here's how #184BB2 works with other colors. Named schemes with #184BB2 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #184BB2 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Cobalt 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 #184BB2 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4172D1

Cobalt 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 Cobalt Blue.

Vintage Leather Lead · 5 colors

Lead #184BB2 Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Cobalt 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 #184BB2 Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Cobalt 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 #184BB2 Secondary #697DA1 Support #9D8F88 Ink #18140F

Cobalt 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 Cobalt Blue carrying the quiet middle.

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Color Lab

How #184BB2 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 8/100

Cool

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 58/100

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 57/100

Moderate

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

Brand distinctiveness 47/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 85/100

Very high

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

Surface fit 11/100

Very low

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

Print safety 67/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #184BB2

For UI

For branding

For interior

For fashion

People also use #184BB2 with

Lagoon Blue Egyptian Blue Dark Goldenrod Gainsboro Charcoal

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 7.8:1. Use

Subtle surface Use #D0DBF1 for cards and hover fills. Tint 80

Avoid beside #1818B4 — 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 #184BB2 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: #184BB2;
  --color-base-rgb: 24 75 178;
  --color-base-oklch: oklch(44.7% 0.173 262.2);
  --color-50: #F1F5FE;
  --color-100: #DAE5FB;
  --color-200: #B7CCF5;
  --color-300: #87A7E9;
  --color-400: #5A84D8;
  --color-500: #3764BD;
  --color-600: #325190;
  --color-700: #293D66;
  --color-800: #1E2A43;
  --color-900: #141B29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cobalt-blue: {
    50: '#F1F5FE',
    100: '#DAE5FB',
    200: '#B7CCF5',
    300: '#87A7E9',
    400: '#5A84D8',
    500: '#3764BD',
    600: '#325190',
    700: '#293D66',
    800: '#1E2A43',
    900: '#141B29',
  },
}

$base: #184BB2;
$base-ink: #FFFFFF;
$base-50: #F1F5FE;
$base-100: #DAE5FB;
$base-200: #B7CCF5;
$base-300: #87A7E9;
$base-400: #5A84D8;
$base-500: #3764BD;
$base-600: #325190;
$base-700: #293D66;
$base-800: #1E2A43;
$base-900: #141B29;
$base-hover: #143D90;
$base-subtle: #B7C8EC;

{
    "color": {
        "base": {
            "value": "#184BB2",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F5FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE5FB",
                "type": "color"
            },
            "200": {
                "value": "#B7CCF5",
                "type": "color"
            },
            "300": {
                "value": "#87A7E9",
                "type": "color"
            },
            "400": {
                "value": "#5A84D8",
                "type": "color"
            },
            "500": {
                "value": "#3764BD",
                "type": "color"
            },
            "600": {
                "value": "#325190",
                "type": "color"
            },
            "700": {
                "value": "#293D66",
                "type": "color"
            },
            "800": {
                "value": "#1E2A43",
                "type": "color"
            },
            "900": {
                "value": "#141B29",
                "type": "color"
            }
        }
    }
}

Palettes built on #184BB2

Color Lab

Pairs with #184BB2

UI roles & guardrails

In real applications

Scales

Every model

Export