What color is #665FEC?

#665FEC is a light, vivid blue-violet. In RGB it is rgb(102, 95, 236), and in HSL hsl(243, 79%, 65%).

Is #665FEC accessible as text?

On white, #665FEC has a contrast ratio of 4.76:1 (passes WCAG AA for body text); on black it is 4.41:1 (fails). For text placed on #665FEC, use white for the best readability.

What is the closest Tailwind color to #665FEC?

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

What colors go well with #665FEC?

#665FEC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E5EC5F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #665FEC below.

Is #665FEC good for buttons?

#665FEC works well for buttons and highlights, but use white text on #665FEC — black text only reaches 4.41:1, below the 4.5:1 needed for normal-size labels.

Is #665FEC the same as CSS mediumslateblue?

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

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

Palettes built on #665FEC

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

Tech Product Signal · 5 colors

Signal #665FEC 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 #665FEC 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 #665FEC Secondary #999ECF 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 #665FEC 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 #665FEC Secondary #E86A71 Accent #F6934D 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 #665FEC 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 18/100

Cool

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

Softness 35/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 79/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 82/100

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 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #665FEC

For UI

For branding

For interior

For fashion

People also use #665FEC with

Maya Blue Medium Orchid Naples Yellow 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 4.8:1. Use

Subtle surface Use #E4E3F7 for cards and hover fills. Tint 80

Avoid beside #955FEC — 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 #665FEC 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: #665FEC;
  --color-base-rgb: 102 95 236;
  --color-base-oklch: oklch(57.2% 0.206 279.9);
  --color-50: #F1F1FE;
  --color-100: #DBDAFC;
  --color-200: #B9B6F6;
  --color-300: #8A85EB;
  --color-400: #5E58DA;
  --color-500: #3C35C0;
  --color-600: #353092;
  --color-700: #2B2867;
  --color-800: #1F1D43;
  --color-900: #151429;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  iris: {
    50: '#F1F1FE',
    100: '#DBDAFC',
    200: '#B9B6F6',
    300: '#8A85EB',
    400: '#5E58DA',
    500: '#3C35C0',
    600: '#353092',
    700: '#2B2867',
    800: '#1F1D43',
    900: '#151429',
  },
}

$base: #665FEC;
$base-ink: #FFFFFF;
$base-50: #F1F1FE;
$base-100: #DBDAFC;
$base-200: #B9B6F6;
$base-300: #8A85EB;
$base-400: #5E58DA;
$base-500: #3C35C0;
$base-600: #353092;
$base-700: #2B2867;
$base-800: #1F1D43;
$base-900: #151429;
$base-hover: #2E24E5;
$base-subtle: #D6D4F4;

{
    "color": {
        "base": {
            "value": "#665FEC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F1FE",
                "type": "color"
            },
            "100": {
                "value": "#DBDAFC",
                "type": "color"
            },
            "200": {
                "value": "#B9B6F6",
                "type": "color"
            },
            "300": {
                "value": "#8A85EB",
                "type": "color"
            },
            "400": {
                "value": "#5E58DA",
                "type": "color"
            },
            "500": {
                "value": "#3C35C0",
                "type": "color"
            },
            "600": {
                "value": "#353092",
                "type": "color"
            },
            "700": {
                "value": "#2B2867",
                "type": "color"
            },
            "800": {
                "value": "#1F1D43",
                "type": "color"
            },
            "900": {
                "value": "#151429",
                "type": "color"
            }
        }
    }
}