What color is #187BEE?

#187BEE is a medium, vivid blue. In RGB it is rgb(24, 123, 238), and in HSL hsl(212, 86%, 51%).

Is #187BEE accessible as text?

On white, #187BEE has a contrast ratio of 4.11:1 (fails WCAG AA for body text); on black it is 5.11:1 (passes). For text placed on #187BEE, use black for the best readability.

What is the closest Tailwind color to #187BEE?

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

What colors go well with #187BEE?

#187BEE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EE8917. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #187BEE below.

Is #187BEE good for buttons?

#187BEE works well for buttons and highlights, but use black text on #187BEE — white text only reaches 4.11:1, below the 4.5:1 needed for normal-size labels.

Is #187BEE the same as CSS royalblue?

No — #187BEE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#187BEE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #187BEE

Not just a swatch — here's how #187BEE works with other colors. Named schemes with #187BEE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #187BEE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #53A3FF

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

Coastal Morning Lead · 5 colors

Lead #187BEE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Azure 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 #187BEE Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CA Secondary #322B2F

Azure 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 #187BEE Secondary #8EABD4 Support #9D8F89 Ink #16140F

Azure 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 Azure carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #187BEE Secondary #E76A77 Accent #F79153 Anchor #573B59 Surface #EEEBD6

Azure 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 #187BEE 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 5/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 25/100

Low

A faint retro warmth without tipping into sepia.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 75/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 83/100

Very high

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

Surface fit 16/100

Very low

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

Print safety 61/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #187BEE

For UI

For branding

For interior

For fashion

People also use #187BEE with

Cyan Ultramarine Peru 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 4.5:1. Use

Subtle surface Use #D7E5F5 for cards and hover fills. Tint 80

Avoid beside #1733EE — 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 #187BEE at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #187BEE;
  --color-base-rgb: 24 123 238;
  --color-base-oklch: oklch(59.5% 0.193 256.3);
  --color-50: #F0F7FE;
  --color-100: #D8E9FD;
  --color-200: #B3D4F9;
  --color-300: #80B4EF;
  --color-400: #5294E0;
  --color-500: #2F75C6;
  --color-600: #2B5D96;
  --color-700: #25456A;
  --color-800: #1C2F45;
  --color-900: #131E2A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  azure: {
    50: '#F0F7FE',
    100: '#D8E9FD',
    200: '#B3D4F9',
    300: '#80B4EF',
    400: '#5294E0',
    500: '#2F75C6',
    600: '#2B5D96',
    700: '#25456A',
    800: '#1C2F45',
    900: '#131E2A',
  },
}

$base: #187BEE;
$base-ink: #141310;
$base-50: #F0F7FE;
$base-100: #D8E9FD;
$base-200: #B3D4F9;
$base-300: #80B4EF;
$base-400: #5294E0;
$base-500: #2F75C6;
$base-600: #2B5D96;
$base-700: #25456A;
$base-800: #1C2F45;
$base-900: #131E2A;
$base-hover: #0F62C2;
$base-subtle: #C1D8F2;

{
    "color": {
        "base": {
            "value": "#187BEE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F7FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E9FD",
                "type": "color"
            },
            "200": {
                "value": "#B3D4F9",
                "type": "color"
            },
            "300": {
                "value": "#80B4EF",
                "type": "color"
            },
            "400": {
                "value": "#5294E0",
                "type": "color"
            },
            "500": {
                "value": "#2F75C6",
                "type": "color"
            },
            "600": {
                "value": "#2B5D96",
                "type": "color"
            },
            "700": {
                "value": "#25456A",
                "type": "color"
            },
            "800": {
                "value": "#1C2F45",
                "type": "color"
            },
            "900": {
                "value": "#131E2A",
                "type": "color"
            }
        }
    }
}