What color is #186BD0?

#186BD0 is a medium, vivid blue. In RGB it is rgb(24, 107, 208), and in HSL hsl(213, 79%, 45%).

Is #186BD0 accessible as text?

On white, #186BD0 has a contrast ratio of 5.18:1 (passes WCAG AA for body text); on black it is 4.05:1 (fails). For text placed on #186BD0, use white for the best readability.

What is the closest Tailwind color to #186BD0?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #186BD0?

#186BD0 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CD7C18. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #186BD0 below.

Is #186BD0 good for buttons?

#186BD0 works well for buttons and highlights, but use white text on #186BD0 — black text only reaches 4.05:1, below the 4.5:1 needed for normal-size labels.

Is #186BD0 the same as CSS royalblue?

No — #186BD0 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#186BD0 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #186BD0

Not just a swatch — here's how #186BD0 works with other colors. Named schemes with #186BD0 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #186BD0 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

True 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 #186BD0 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4D92EF

True 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 True Blue.

Vintage Leather Lead · 5 colors

Lead #186BD0 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

True 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 #186BD0 Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CA Secondary #322B2F

True 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 #186BD0 Secondary #809ABE Support #9D8F89 Ink #16140F

True 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 True Blue carrying the quiet middle.

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Color Lab

How #186BD0 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 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 48/100

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 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 47/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 96/100

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 65/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #186BD0

For UI

For branding

For interior

For fashion

People also use #186BD0 with

Turquoise Medium Blue Ochre 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 5.2:1. Use

Subtle surface Use #D3E1F3 for cards and hover fills. Tint 80

Avoid beside #182DCD — 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 #186BD0 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: #186BD0;
  --color-base-rgb: 24 107 208;
  --color-base-oklch: oklch(53.9% 0.174 256.7);
  --color-50: #F1F7FE;
  --color-100: #DAE9FC;
  --color-200: #B6D3F6;
  --color-300: #85B3EB;
  --color-400: #5892DA;
  --color-500: #3573C0;
  --color-600: #305C92;
  --color-700: #284467;
  --color-800: #1D2F43;
  --color-900: #141E29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F1F7FE',
    100: '#DAE9FC',
    200: '#B6D3F6',
    300: '#85B3EB',
    400: '#5892DA',
    500: '#3573C0',
    600: '#305C92',
    700: '#284467',
    800: '#1D2F43',
    900: '#141E29',
  },
}

$base: #186BD0;
$base-ink: #FFFFFF;
$base-50: #F1F7FE;
$base-100: #DAE9FC;
$base-200: #B6D3F6;
$base-300: #85B3EB;
$base-400: #5892DA;
$base-500: #3573C0;
$base-600: #305C92;
$base-700: #284467;
$base-800: #1D2F43;
$base-900: #141E29;
$base-hover: #1355A4;
$base-subtle: #BCD2EE;

{
    "color": {
        "base": {
            "value": "#186BD0",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F7FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE9FC",
                "type": "color"
            },
            "200": {
                "value": "#B6D3F6",
                "type": "color"
            },
            "300": {
                "value": "#85B3EB",
                "type": "color"
            },
            "400": {
                "value": "#5892DA",
                "type": "color"
            },
            "500": {
                "value": "#3573C0",
                "type": "color"
            },
            "600": {
                "value": "#305C92",
                "type": "color"
            },
            "700": {
                "value": "#284467",
                "type": "color"
            },
            "800": {
                "value": "#1D2F43",
                "type": "color"
            },
            "900": {
                "value": "#141E29",
                "type": "color"
            }
        }
    }
}

Palettes built on #186BD0

Color Lab

Pairs with #186BD0

UI roles & guardrails

In real applications

Scales

Every model

Export