What color is #866FEE?

#866FEE is a light, vivid indigo. In RGB it is rgb(134, 111, 238), and in HSL hsl(251, 79%, 68%).

Is #866FEE accessible as text?

On white, #866FEE has a contrast ratio of 3.80:1 (fails WCAG AA for body text); on black it is 5.52:1 (passes). For text placed on #866FEE, use black for the best readability.

What is the closest Tailwind color to #866FEE?

The nearest Tailwind CSS token is indigo-400 (#7C86FF).

What colors go well with #866FEE?

#866FEE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D6EE6D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #866FEE below.

Is #866FEE good for buttons?

#866FEE works well for buttons and highlights, but use black text on #866FEE — white text only reaches 3.80:1, below the 4.5:1 needed for normal-size labels.

Is #866FEE the same as CSS mediumslateblue?

No — #866FEE is not the CSS named color mediumslateblue, but mediumslateblue (#7B68EE) is the closest CSS named color.

#866FEE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #866FEE

Not just a swatch — here's how #866FEE works with other colors. Named schemes with #866FEE in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #866FEE Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

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

Nordic Calm Accent · 5 colors

Accent #866FEE Secondary #AFB4B8 Surface #F1F2F0 Support #7F92A7 Anchor #2E3236

Medium Slate Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #866FEE Secondary #B0ADDA Support #9D9088 Ink #18140F

Medium Slate 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 Medium Slate Blue carrying the quiet middle.

Tech Product Signal · 5 colors

Signal #866FEE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #A999FF

Medium Slate 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 Medium Slate Blue.

Modern Café Dominant · 5 colors

Dominant #866FEE Anchor #3B2923 Surface #F3E1D2 Accent #749F7C Secondary #3C3734

Medium Slate Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Build a working theme in the generator →

Color Lab

How #866FEE 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 24/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 41/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 71/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 79/100

High

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

Surface fit 19/100

Very low

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

Print safety 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #866FEE

For UI

For branding

For interior

For fashion

People also use #866FEE with

Maya Blue Heliotrope Pear Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.9:1. Use

Subtle surface Use #E9E5F8 for cards and hover fills. Tint 80

Avoid beside #B06DEE — 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 #866FEE 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: #866FEE;
  --color-base-rgb: 134 111 238;
  --color-base-oklch: oklch(62.5% 0.184 288.2);
  --color-50: #F3F1FE;
  --color-100: #E0DAFC;
  --color-200: #C2B6F6;
  --color-300: #9785EB;
  --color-400: #7058DA;
  --color-500: #4E35C0;
  --color-600: #423092;
  --color-700: #332867;
  --color-800: #241D43;
  --color-900: #181429;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  medium-slate-blue: {
    50: '#F3F1FE',
    100: '#E0DAFC',
    200: '#C2B6F6',
    300: '#9785EB',
    400: '#7058DA',
    500: '#4E35C0',
    600: '#423092',
    700: '#332867',
    800: '#241D43',
    900: '#181429',
  },
}

$base: #866FEE;
$base-ink: #141310;
$base-50: #F3F1FE;
$base-100: #E0DAFC;
$base-200: #C2B6F6;
$base-300: #9785EB;
$base-400: #7058DA;
$base-500: #4E35C0;
$base-600: #423092;
$base-700: #332867;
$base-800: #241D43;
$base-900: #181429;
$base-hover: #512FE7;
$base-subtle: #DDD8F5;

{
    "color": {
        "base": {
            "value": "#866FEE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F1FE",
                "type": "color"
            },
            "100": {
                "value": "#E0DAFC",
                "type": "color"
            },
            "200": {
                "value": "#C2B6F6",
                "type": "color"
            },
            "300": {
                "value": "#9785EB",
                "type": "color"
            },
            "400": {
                "value": "#7058DA",
                "type": "color"
            },
            "500": {
                "value": "#4E35C0",
                "type": "color"
            },
            "600": {
                "value": "#423092",
                "type": "color"
            },
            "700": {
                "value": "#332867",
                "type": "color"
            },
            "800": {
                "value": "#241D43",
                "type": "color"
            },
            "900": {
                "value": "#181429",
                "type": "color"
            }
        }
    }
}

Palettes built on #866FEE

Color Lab

Pairs with #866FEE

UI roles & guardrails

In real applications

Scales

Every model

Export