What color is #406BBB?

#406BBB is a medium blue. In RGB it is rgb(64, 107, 187), and in HSL hsl(219, 49%, 49%).

Is #406BBB accessible as text?

On white, #406BBB has a contrast ratio of 5.20:1 (passes WCAG AA for body text); on black it is 4.04:1 (fails). For text placed on #406BBB, use white for the best readability.

What is the closest Tailwind color to #406BBB?

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

What colors go well with #406BBB?

#406BBB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BA8F40. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #406BBB below.

Is #406BBB good for buttons?

#406BBB works well for buttons and highlights, but use white text on #406BBB — black text only reaches 4.04:1, below the 4.5:1 needed for normal-size labels.

Is #406BBB the same as CSS royalblue?

No — #406BBB is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#406BBB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #406BBB

Not just a swatch — here's how #406BBB works with other colors. Named schemes with #406BBB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #406BBB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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 #406BBB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #6790DB

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 #406BBB Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

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 #406BBB Surface #F6E5D8 Anchor #5A2144 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 #F8F4EF Accent #406BBB Secondary #8898B5 Support #9D8F88 Ink #18140F

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.

Build a working theme in the generator →

Color Lab

How #406BBB 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 16/100

Cool

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

Softness 42/100

Moderate

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 47/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 36/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 100/100

Very high

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

Surface fit 15/100

Very low

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

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #406BBB

For UI

For branding

For interior

For fashion

People also use #406BBB with

Lagoon Blue Grape Caramel 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 #DCE2EE for cards and hover fills. Tint 80

Avoid beside #4042BA — 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 #406BBB at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #406BBB;
  --color-base-rgb: 64 107 187;
  --color-base-oklch: oklch(53.7% 0.134 261.7);
  --color-50: #F3F6FB;
  --color-100: #E0E7F5;
  --color-200: #C2D0EA;
  --color-300: #98AED7;
  --color-400: #708DC2;
  --color-500: #4F6DA6;
  --color-600: #42587F;
  --color-700: #34415B;
  --color-800: #252D3C;
  --color-900: #181D25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F3F6FB',
    100: '#E0E7F5',
    200: '#C2D0EA',
    300: '#98AED7',
    400: '#708DC2',
    500: '#4F6DA6',
    600: '#42587F',
    700: '#34415B',
    800: '#252D3C',
    900: '#181D25',
  },
}

$base: #406BBB;
$base-ink: #FFFFFF;
$base-50: #F3F6FB;
$base-100: #E0E7F5;
$base-200: #C2D0EA;
$base-300: #98AED7;
$base-400: #708DC2;
$base-500: #4F6DA6;
$base-600: #42587F;
$base-700: #34415B;
$base-800: #252D3C;
$base-900: #181D25;
$base-hover: #335595;
$base-subtle: #C9D4E7;

{
    "color": {
        "base": {
            "value": "#406BBB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E7F5",
                "type": "color"
            },
            "200": {
                "value": "#C2D0EA",
                "type": "color"
            },
            "300": {
                "value": "#98AED7",
                "type": "color"
            },
            "400": {
                "value": "#708DC2",
                "type": "color"
            },
            "500": {
                "value": "#4F6DA6",
                "type": "color"
            },
            "600": {
                "value": "#42587F",
                "type": "color"
            },
            "700": {
                "value": "#34415B",
                "type": "color"
            },
            "800": {
                "value": "#252D3C",
                "type": "color"
            },
            "900": {
                "value": "#181D25",
                "type": "color"
            }
        }
    }
}

Palettes built on #406BBB

Color Lab

Pairs with #406BBB

UI roles & guardrails

In real applications

Scales

Every model

Export