What color is #665EFA?

#665EFA is a light, vivid blue-violet. In RGB it is rgb(102, 94, 250), and in HSL hsl(243, 94%, 67%).

Is #665EFA accessible as text?

On white, #665EFA has a contrast ratio of 4.62:1 (passes WCAG AA for body text); on black it is 4.55:1 (passes). For text placed on #665EFA, use white for the best readability.

What is the closest Tailwind color to #665EFA?

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

What colors go well with #665EFA?

#665EFA pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F2FA5C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #665EFA below.

Is #665EFA good for buttons?

#665EFA works for buttons; white text has the higher contrast, so prefer it for labels.

Is #665EFA the same as CSS mediumslateblue?

No — #665EFA is not the CSS named color mediumslateblue, but mediumslateblue (#7B68EE) is the closest CSS named color.

#665EFA Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #665EFA

Not just a swatch — here's how #665EFA works with other colors. Named schemes with #665EFA in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #665EFA Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #888AFF

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.

Berry & Cream Lead · 5 colors

Lead #665EFA Surface #F6E5D8 Anchor #5B2142 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 #665EFA Secondary #9AA0D6 Support #9D9088 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.

Coastal Morning Lead · 5 colors

Lead #665EFA Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

Iris opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Sunset Warmth Glow · 5 colors

Glow #665EFA Secondary #E86A71 Accent #F6934E Anchor #583B57 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 #665EFA 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 17/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 46/100

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 87/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 72/100

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 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #665EFA

For UI

For branding

For interior

For fashion

People also use #665EFA with

Maya Blue Medium Orchid 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 4.6:1. Use

Subtle surface Use #E4E3FA for cards and hover fills. Tint 80

Avoid beside #985CFA — 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 #665EFA 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: #665EFA;
  --color-base-rgb: 102 94 250;
  --color-base-oklch: oklch(58.1% 0.224 279.1);
  --color-50: #F1F0FE;
  --color-100: #DAD8FD;
  --color-200: #B4B1FC;
  --color-300: #817BF4;
  --color-400: #534BE7;
  --color-500: #3028CD;
  --color-600: #2C269B;
  --color-700: #25216D;
  --color-800: #1C1A47;
  --color-900: #13122B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  iris: {
    50: '#F1F0FE',
    100: '#DAD8FD',
    200: '#B4B1FC',
    300: '#817BF4',
    400: '#534BE7',
    500: '#3028CD',
    600: '#2C269B',
    700: '#25216D',
    800: '#1C1A47',
    900: '#13122B',
  },
}

$base: #665EFA;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DAD8FD;
$base-200: #B4B1FC;
$base-300: #817BF4;
$base-400: #534BE7;
$base-500: #3028CD;
$base-600: #2C269B;
$base-700: #25216D;
$base-800: #1C1A47;
$base-900: #13122B;
$base-hover: #2519F8;
$base-subtle: #D6D4F8;

{
    "color": {
        "base": {
            "value": "#665EFA",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DAD8FD",
                "type": "color"
            },
            "200": {
                "value": "#B4B1FC",
                "type": "color"
            },
            "300": {
                "value": "#817BF4",
                "type": "color"
            },
            "400": {
                "value": "#534BE7",
                "type": "color"
            },
            "500": {
                "value": "#3028CD",
                "type": "color"
            },
            "600": {
                "value": "#2C269B",
                "type": "color"
            },
            "700": {
                "value": "#25216D",
                "type": "color"
            },
            "800": {
                "value": "#1C1A47",
                "type": "color"
            },
            "900": {
                "value": "#13122B",
                "type": "color"
            }
        }
    }
}

Palettes built on #665EFA

Color Lab

Pairs with #665EFA

UI roles & guardrails

In real applications

Scales

Every model

Export