What color is #6665B9?

#6665B9 is a medium blue-violet. In RGB it is rgb(102, 101, 185), and in HSL hsl(241, 38%, 56%).

Is #6665B9 accessible as text?

On white, #6665B9 has a contrast ratio of 5.09:1 (passes WCAG AA for body text); on black it is 4.13:1 (fails). For text placed on #6665B9, use white for the best readability.

What is the closest Tailwind color to #6665B9?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #6665B9?

#6665B9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B8B964. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6665B9 below.

Is #6665B9 good for buttons?

#6665B9 works well for buttons and highlights, but use white text on #6665B9 — black text only reaches 4.13:1, below the 4.5:1 needed for normal-size labels.

Is #6665B9 the same as CSS slateblue?

No — #6665B9 is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#6665B9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6665B9

Not just a swatch — here's how #6665B9 works with other colors. Named schemes with #6665B9 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #6665B9 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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

Vintage Leather Lead · 5 colors

Lead #6665B9 Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

Very Peri plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Modern Café Dominant · 5 colors

Dominant #6665B9 Anchor #3B2923 Surface #F3E1D2 Accent #759F7C Secondary #3C3734

Very Peri 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.

Berry & Cream Lead · 5 colors

Lead #6665B9 Surface #F5E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #332B2F

Very Peri 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 #6665B9 Secondary #9598B6 Support #9D9088 Ink #18140F

Very Peri 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 Very Peri carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #6665B9 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 26/100

Cool

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

Softness 43/100

Moderate

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 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 35/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 99/100

Very high

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

Surface fit 18/100

Very low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6665B9

For UI

For branding

For interior

For fashion

People also use #6665B9 with

Iceberg Amethyst Dark Khaki 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 5.1:1. Use

Subtle surface Use #E3E2EF for cards and hover fills. Tint 80

Avoid beside #8264B9 — 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 #6665B9 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: #6665B9;
  --color-base-rgb: 102 101 185;
  --color-base-oklch: oklch(54.7% 0.128 281.8);
  --color-50: #F4F4FB;
  --color-100: #E3E2F3;
  --color-200: #C7C7E6;
  --color-300: #A09FD0;
  --color-400: #7B7AB8;
  --color-500: #5A599C;
  --color-600: #4A4979;
  --color-700: #393857;
  --color-800: #28273A;
  --color-900: #1A1924;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  very-peri: {
    50: '#F4F4FB',
    100: '#E3E2F3',
    200: '#C7C7E6',
    300: '#A09FD0',
    400: '#7B7AB8',
    500: '#5A599C',
    600: '#4A4979',
    700: '#393857',
    800: '#28273A',
    900: '#1A1924',
  },
}

$base: #6665B9;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E3E2F3;
$base-200: #C7C7E6;
$base-300: #A09FD0;
$base-400: #7B7AB8;
$base-500: #5A599C;
$base-600: #4A4979;
$base-700: #393857;
$base-800: #28273A;
$base-900: #1A1924;
$base-hover: #48479E;
$base-subtle: #D4D4E7;

{
    "color": {
        "base": {
            "value": "#6665B9",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E3E2F3",
                "type": "color"
            },
            "200": {
                "value": "#C7C7E6",
                "type": "color"
            },
            "300": {
                "value": "#A09FD0",
                "type": "color"
            },
            "400": {
                "value": "#7B7AB8",
                "type": "color"
            },
            "500": {
                "value": "#5A599C",
                "type": "color"
            },
            "600": {
                "value": "#4A4979",
                "type": "color"
            },
            "700": {
                "value": "#393857",
                "type": "color"
            },
            "800": {
                "value": "#28273A",
                "type": "color"
            },
            "900": {
                "value": "#1A1924",
                "type": "color"
            }
        }
    }
}

Palettes built on #6665B9

Color Lab

Pairs with #6665B9

UI roles & guardrails

In real applications

Scales

Every model

Export