What color is #5366FB?

#5366FB is a light, vivid blue-violet. In RGB it is rgb(83, 102, 251), and in HSL hsl(233, 95%, 65%).

Is #5366FB accessible as text?

On white, #5366FB has a contrast ratio of 4.51:1 (passes WCAG AA for body text); on black it is 4.66:1 (passes). For text placed on #5366FB, use black for the best readability.

What is the closest Tailwind color to #5366FB?

The nearest Tailwind CSS token is indigo-500 (#615FFF).

What colors go well with #5366FB?

#5366FB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FBE751. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #5366FB below.

Is #5366FB good for buttons?

#5366FB works for buttons; black text has the higher contrast, so prefer it for labels.

Is #5366FB the same as CSS royalblue?

No — #5366FB is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#5366FB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #5366FB

Not just a swatch — here's how #5366FB works with other colors. Named schemes with #5366FB in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #5366FB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7791FF

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

Coastal Morning Lead · 5 colors

Lead #5366FB Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Iris 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 #5366FB Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Iris 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 #5366FB Secondary #94A3D7 Support #9D8F88 Ink #18140F

Iris 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 Iris carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #5366FB Secondary #E86A73 Accent #F6924F Anchor #573B58 Surface #F7E7D7

Iris 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 #5366FB 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 13/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 45/100

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 18/100

Very low

Clean and current — no dusty, aged cast.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 85/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 73/100

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 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #5366FB

For UI

For branding

For interior

For fashion

People also use #5366FB with

Light Sky Blue Medium Slate Blue Flax Gainsboro Prussian Blue

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 4.5:1. Use

Subtle surface Use #E1E4F9 for cards and hover fills. Tint 80

Avoid beside #7651FB — 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 #5366FB 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: #5366FB;
  --color-base-rgb: 83 102 251;
  --color-base-oklch: oklch(58.3% 0.221 272.1);
  --color-50: #F0F2FE;
  --color-100: #D8DCFD;
  --color-200: #B1B9FC;
  --color-300: #7A89F5;
  --color-400: #4A5DE8;
  --color-500: #273ACE;
  --color-600: #26349C;
  --color-700: #212A6E;
  --color-800: #1A1F47;
  --color-900: #12152B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  iris: {
    50: '#F0F2FE',
    100: '#D8DCFD',
    200: '#B1B9FC',
    300: '#7A89F5',
    400: '#4A5DE8',
    500: '#273ACE',
    600: '#26349C',
    700: '#212A6E',
    800: '#1A1F47',
    900: '#12152B',
  },
}

$base: #5366FB;
$base-ink: #141310;
$base-50: #F0F2FE;
$base-100: #D8DCFD;
$base-200: #B1B9FC;
$base-300: #7A89F5;
$base-400: #4A5DE8;
$base-500: #273ACE;
$base-600: #26349C;
$base-700: #212A6E;
$base-800: #1A1F47;
$base-900: #12152B;
$base-hover: #102BF9;
$base-subtle: #D1D5F8;

{
    "color": {
        "base": {
            "value": "#5366FB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DCFD",
                "type": "color"
            },
            "200": {
                "value": "#B1B9FC",
                "type": "color"
            },
            "300": {
                "value": "#7A89F5",
                "type": "color"
            },
            "400": {
                "value": "#4A5DE8",
                "type": "color"
            },
            "500": {
                "value": "#273ACE",
                "type": "color"
            },
            "600": {
                "value": "#26349C",
                "type": "color"
            },
            "700": {
                "value": "#212A6E",
                "type": "color"
            },
            "800": {
                "value": "#1A1F47",
                "type": "color"
            },
            "900": {
                "value": "#12152B",
                "type": "color"
            }
        }
    }
}

Palettes built on #5366FB

Color Lab

Pairs with #5366FB

UI roles & guardrails

In real applications

Scales

Every model

Export