What color is #647FDA?

#647FDA is a light, soft blue. In RGB it is rgb(100, 127, 218), and in HSL hsl(226, 61%, 62%).

Is #647FDA accessible as text?

On white, #647FDA has a contrast ratio of 3.76:1 (fails WCAG AA for body text); on black it is 5.59:1 (passes). For text placed on #647FDA, use black for the best readability.

What is the closest Tailwind color to #647FDA?

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

What colors go well with #647FDA?

#647FDA pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D9BE63. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #647FDA below.

Is #647FDA good for buttons?

#647FDA works well for buttons and highlights, but use black text on #647FDA — white text only reaches 3.76:1, below the 4.5:1 needed for normal-size labels.

Is #647FDA the same as CSS cornflowerblue?

No — #647FDA is not the CSS named color cornflowerblue, but cornflowerblue (#6495ED) is the closest CSS named color.

#647FDA Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #647FDA

Not just a swatch — here's how #647FDA works with other colors. Named schemes with #647FDA in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #647FDA Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Tech Product Signal · 5 colors

Signal #647FDA Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8AA6FA

Glaucous is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Glaucous.

Vintage Leather Lead · 5 colors

Lead #647FDA Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

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

Berry & Cream Lead · 5 colors

Lead #647FDA Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Glaucous 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 #647FDA Secondary #A4B0D1 Support #9D8F88 Ink #18140F

Glaucous 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 Glaucous carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #647FDA 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 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

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 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 87/100

Very high

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

Surface fit 21/100

Low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #647FDA

For UI

For branding

For interior

For fashion

People also use #647FDA with

Sky Blue Amethyst Honey Gainsboro Charcoal

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 #E3E7F4 for cards and hover fills. Tint 80

Avoid beside #6F63D9 — 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 #647FDA 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: #647FDA;
  --color-base-rgb: 100 127 218;
  --color-base-oklch: oklch(61.8% 0.141 269.5);
  --color-50: #F2F5FC;
  --color-100: #DDE4F8;
  --color-200: #BDC9EF;
  --color-300: #90A3DF;
  --color-400: #677ECB;
  --color-500: #455EB0;
  --color-600: #3B4D87;
  --color-700: #2F3A60;
  --color-800: #22293F;
  --color-900: #161A27;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F2F5FC',
    100: '#DDE4F8',
    200: '#BDC9EF',
    300: '#90A3DF',
    400: '#677ECB',
    500: '#455EB0',
    600: '#3B4D87',
    700: '#2F3A60',
    800: '#22293F',
    900: '#161A27',
  },
}

$base: #647FDA;
$base-ink: #141310;
$base-50: #F2F5FC;
$base-100: #DDE4F8;
$base-200: #BDC9EF;
$base-300: #90A3DF;
$base-400: #677ECB;
$base-500: #455EB0;
$base-600: #3B4D87;
$base-700: #2F3A60;
$base-800: #22293F;
$base-900: #161A27;
$base-hover: #3155CC;
$base-subtle: #D4DBEF;

{
    "color": {
        "base": {
            "value": "#647FDA",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F5FC",
                "type": "color"
            },
            "100": {
                "value": "#DDE4F8",
                "type": "color"
            },
            "200": {
                "value": "#BDC9EF",
                "type": "color"
            },
            "300": {
                "value": "#90A3DF",
                "type": "color"
            },
            "400": {
                "value": "#677ECB",
                "type": "color"
            },
            "500": {
                "value": "#455EB0",
                "type": "color"
            },
            "600": {
                "value": "#3B4D87",
                "type": "color"
            },
            "700": {
                "value": "#2F3A60",
                "type": "color"
            },
            "800": {
                "value": "#22293F",
                "type": "color"
            },
            "900": {
                "value": "#161A27",
                "type": "color"
            }
        }
    }
}

Palettes built on #647FDA

Color Lab

Pairs with #647FDA

UI roles & guardrails

In real applications

Scales

Every model

Export