What color is #4245CF?

#4245CF is a medium blue-violet. In RGB it is rgb(66, 69, 207), and in HSL hsl(239, 59%, 54%).

Is #4245CF accessible as text?

On white, #4245CF has a contrast ratio of 7.04:1 (passes WCAG AA for body text); on black it is 2.98:1 (fails). For text placed on #4245CF, use white for the best readability.

What is the closest Tailwind color to #4245CF?

The nearest Tailwind CSS token is indigo-700 (#432DD7).

What colors go well with #4245CF?

#4245CF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CFCD44. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4245CF below.

Is #4245CF good for buttons?

#4245CF works well for buttons and highlights, but use white text on #4245CF — black text only reaches 2.98:1, below the 4.5:1 needed for normal-size labels.

Is #4245CF the same as CSS slateblue?

No — #4245CF is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#4245CF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4245CF

Not just a swatch — here's how #4245CF works with other colors. Named schemes with #4245CF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4245CF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6270ED

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

Coastal Morning Lead · 5 colors

Lead #4245CF Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #4245CF Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Cerulean 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 #4245CF Secondary #7983B2 Support #9D9088 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #4245CF Secondary #E86A72 Accent #F6924F Anchor #573B58 Surface #F7E7D7

Cerulean 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 #4245CF 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 14/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 56/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 80/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 80/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #4245CF

For UI

For branding

For interior

For fashion

People also use #4245CF with

Iceberg Dark Orchid Citrine Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

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 7.0:1. Use

Subtle surface Use #DEDEF2 for cards and hover fills. Tint 80

Avoid beside #7044CF — 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 #4245CF 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: #4245CF;
  --color-base-rgb: 66 69 207;
  --color-base-oklch: oklch(48.0% 0.207 274.4);
  --color-50: #F2F3FC;
  --color-100: #DEDEF7;
  --color-200: #BEBFEE;
  --color-300: #9293DE;
  --color-400: #686ACA;
  --color-500: #4648AE;
  --color-600: #3C3D86;
  --color-700: #30305F;
  --color-800: #22233F;
  --color-900: #171727;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F2F3FC',
    100: '#DEDEF7',
    200: '#BEBFEE',
    300: '#9293DE',
    400: '#686ACA',
    500: '#4648AE',
    600: '#3C3D86',
    700: '#30305F',
    800: '#22233F',
    900: '#171727',
  },
}

$base: #4245CF;
$base-ink: #FFFFFF;
$base-50: #F2F3FC;
$base-100: #DEDEF7;
$base-200: #BEBFEE;
$base-300: #9293DE;
$base-400: #686ACA;
$base-500: #4648AE;
$base-600: #3C3D86;
$base-700: #30305F;
$base-800: #22233F;
$base-900: #171727;
$base-hover: #2D2FAF;
$base-subtle: #CCCDEC;

{
    "color": {
        "base": {
            "value": "#4245CF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F3FC",
                "type": "color"
            },
            "100": {
                "value": "#DEDEF7",
                "type": "color"
            },
            "200": {
                "value": "#BEBFEE",
                "type": "color"
            },
            "300": {
                "value": "#9293DE",
                "type": "color"
            },
            "400": {
                "value": "#686ACA",
                "type": "color"
            },
            "500": {
                "value": "#4648AE",
                "type": "color"
            },
            "600": {
                "value": "#3C3D86",
                "type": "color"
            },
            "700": {
                "value": "#30305F",
                "type": "color"
            },
            "800": {
                "value": "#22233F",
                "type": "color"
            },
            "900": {
                "value": "#171727",
                "type": "color"
            }
        }
    }
}