What color is #186DEE?

#186DEE is a medium, vivid blue. In RGB it is rgb(24, 109, 238), and in HSL hsl(216, 86%, 51%).

Is #186DEE accessible as text?

On white, #186DEE has a contrast ratio of 4.71:1 (passes WCAG AA for body text); on black it is 4.46:1 (fails). For text placed on #186DEE, use white for the best readability.

What is the closest Tailwind color to #186DEE?

The nearest Tailwind CSS token is blue-600 (#155DFC).

What colors go well with #186DEE?

#186DEE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EE9817. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #186DEE below.

Is #186DEE good for buttons?

#186DEE works well for buttons and highlights, but use white text on #186DEE — black text only reaches 4.46:1, below the 4.5:1 needed for normal-size labels.

Is #186DEE the same as CSS royalblue?

No — #186DEE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#186DEE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #186DEE

Not just a swatch — here's how #186DEE works with other colors. Named schemes with #186DEE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #186DEE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4E96FF

Royal 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 Royal Blue.

Coastal Morning Lead · 5 colors

Lead #186DEE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Royal 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 #186DEE Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Royal 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 #186DEE Secondary #85A1CE Support #9D8F88 Ink #16140F

Royal 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 Royal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #186DEE Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

Royal 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 #186DEE 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 7/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 47/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 81/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 81/100

Very high

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

Surface fit 14/100

Very low

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

Print safety 59/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #186DEE

For UI

For branding

For interior

For fashion

People also use #186DEE with

Turquoise Ultramarine Butterscotch Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 4.7:1. Use

Subtle surface Use #D7E3F5 for cards and hover fills. Tint 80

Avoid beside #1725EE — 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 #186DEE 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: #186DEE;
  --color-base-rgb: 24 109 238;
  --color-base-oklch: oklch(56.6% 0.210 259.7);
  --color-50: #F0F6FE;
  --color-100: #D8E7FD;
  --color-200: #B3CFF9;
  --color-300: #80ADEF;
  --color-400: #528BE0;
  --color-500: #2F6BC6;
  --color-600: #2B5696;
  --color-700: #25406A;
  --color-800: #1C2C45;
  --color-900: #131C2A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F0F6FE',
    100: '#D8E7FD',
    200: '#B3CFF9',
    300: '#80ADEF',
    400: '#528BE0',
    500: '#2F6BC6',
    600: '#2B5696',
    700: '#25406A',
    800: '#1C2C45',
    900: '#131C2A',
  },
}

$base: #186DEE;
$base-ink: #FFFFFF;
$base-50: #F0F6FE;
$base-100: #D8E7FD;
$base-200: #B3CFF9;
$base-300: #80ADEF;
$base-400: #528BE0;
$base-500: #2F6BC6;
$base-600: #2B5696;
$base-700: #25406A;
$base-800: #1C2C45;
$base-900: #131C2A;
$base-hover: #0F56C2;
$base-subtle: #C1D5F2;

{
    "color": {
        "base": {
            "value": "#186DEE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E7FD",
                "type": "color"
            },
            "200": {
                "value": "#B3CFF9",
                "type": "color"
            },
            "300": {
                "value": "#80ADEF",
                "type": "color"
            },
            "400": {
                "value": "#528BE0",
                "type": "color"
            },
            "500": {
                "value": "#2F6BC6",
                "type": "color"
            },
            "600": {
                "value": "#2B5696",
                "type": "color"
            },
            "700": {
                "value": "#25406A",
                "type": "color"
            },
            "800": {
                "value": "#1C2C45",
                "type": "color"
            },
            "900": {
                "value": "#131C2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #186DEE

Color Lab

Pairs with #186DEE

UI roles & guardrails

In real applications

Scales

Every model

Export