What color is #6166EF?

#6166EF is a light, vivid blue-violet. In RGB it is rgb(97, 102, 239), and in HSL hsl(238, 82%, 66%).

Is #6166EF accessible as text?

On white, #6166EF 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 #6166EF, use black for the best readability.

What is the closest Tailwind color to #6166EF?

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

What colors go well with #6166EF?

#6166EF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EFEB61. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6166EF below.

Is #6166EF good for buttons?

#6166EF works for buttons; black text has the higher contrast, so prefer it for labels.

Is #6166EF the same as CSS mediumslateblue?

No — #6166EF is not the CSS named color mediumslateblue, but mediumslateblue (#7B68EE) is the closest CSS named color.

#6166EF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6166EF

Not just a swatch — here's how #6166EF works with other colors. Named schemes with #6166EF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #6166EF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8490FF

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 #6166EF 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 #6166EF Secondary #99A2D2 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 #6166EF 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 #6166EF Secondary #E86A72 Accent #F6924E 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 #6166EF 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 36/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 78/100

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 15/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #6166EF

For UI

For branding

For interior

For fashion

People also use #6166EF with

Light Sky 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 4.5:1. Use

Subtle surface Use #E3E4F8 for cards and hover fills. Tint 80

Avoid beside #8C61EF — 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 #6166EF 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: #6166EF;
  --color-base-rgb: 97 102 239;
  --color-base-oklch: oklch(58.3% 0.202 276.6);
  --color-50: #F0F1FE;
  --color-100: #D9DAFC;
  --color-200: #B5B7F8;
  --color-300: #8386ED;
  --color-400: #555ADD;
  --color-500: #3237C3;
  --color-600: #2E3194;
  --color-700: #262969;
  --color-800: #1D1E44;
  --color-900: #14142A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  iris: {
    50: '#F0F1FE',
    100: '#D9DAFC',
    200: '#B5B7F8',
    300: '#8386ED',
    400: '#555ADD',
    500: '#3237C3',
    600: '#2E3194',
    700: '#262969',
    800: '#1D1E44',
    900: '#14142A',
  },
}

$base: #6166EF;
$base-ink: #141310;
$base-50: #F0F1FE;
$base-100: #D9DAFC;
$base-200: #B5B7F8;
$base-300: #8386ED;
$base-400: #555ADD;
$base-500: #3237C3;
$base-600: #2E3194;
$base-700: #262969;
$base-800: #1D1E44;
$base-900: #14142A;
$base-hover: #242BE9;
$base-subtle: #D5D6F5;

{
    "color": {
        "base": {
            "value": "#6166EF",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F1FE",
                "type": "color"
            },
            "100": {
                "value": "#D9DAFC",
                "type": "color"
            },
            "200": {
                "value": "#B5B7F8",
                "type": "color"
            },
            "300": {
                "value": "#8386ED",
                "type": "color"
            },
            "400": {
                "value": "#555ADD",
                "type": "color"
            },
            "500": {
                "value": "#3237C3",
                "type": "color"
            },
            "600": {
                "value": "#2E3194",
                "type": "color"
            },
            "700": {
                "value": "#262969",
                "type": "color"
            },
            "800": {
                "value": "#1D1E44",
                "type": "color"
            },
            "900": {
                "value": "#14142A",
                "type": "color"
            }
        }
    }
}