What color is #252FEF?

#252FEF is a medium, vivid blue. In RGB it is rgb(37, 47, 239), and in HSL hsl(237, 86%, 54%).

Is #252FEF accessible as text?

On white, #252FEF has a contrast ratio of 7.69:1 (passes WCAG AA for body text); on black it is 2.73:1 (fails). For text placed on #252FEF, use white for the best readability.

What is the closest Tailwind color to #252FEF?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #252FEF?

#252FEF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EFE425. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #252FEF below.

Is #252FEF good for buttons?

#252FEF works well for buttons and highlights, but use white text on #252FEF — black text only reaches 2.73:1, below the 4.5:1 needed for normal-size labels.

Is #252FEF the same as CSS blue?

No — #252FEF is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#252FEF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #252FEF

Not just a swatch — here's how #252FEF works with other colors. Named schemes with #252FEF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #252FEF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4167FF

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

Coastal Morning Lead · 5 colors

Lead #252FEF Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Ultramarine 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 #252FEF Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA Secondary #322B2F

Ultramarine 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 #252FEF Secondary #6A81BC Support #9D8F88 Ink #18140F

Ultramarine 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 Ultramarine carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #252FEF Secondary #E86A74 Accent #F69250 Anchor #573B58 Surface #F7E7D7

Ultramarine glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

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Color Lab

How #252FEF 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 11/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 60/100

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 1/100

Very low

Clean and current — no dusty, aged cast.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 47/100

Moderate

Workable accent with care around contrast.

Surface fit 9/100

Very low

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

Print safety 52/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #252FEF

For UI

For branding

For interior

For fashion

People also use #252FEF with

Picton Blue Blue Violet 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 7.7:1. Use

Subtle surface Use #D9DAF6 for cards and hover fills. Tint 80

Avoid beside #5E25EF — 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 #252FEF 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

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Export

:root {
  --color-base: #252FEF;
  --color-base-rgb: 37 47 239;
  --color-base-oklch: oklch(46.9% 0.272 267.9);
  --color-50: #F0F1FE;
  --color-100: #D8DAFD;
  --color-200: #B3B7F9;
  --color-300: #8086EF;
  --color-400: #5259E0;
  --color-500: #2F36C6;
  --color-600: #2B3196;
  --color-700: #25286A;
  --color-800: #1C1E45;
  --color-900: #13142A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultramarine: {
    50: '#F0F1FE',
    100: '#D8DAFD',
    200: '#B3B7F9',
    300: '#8086EF',
    400: '#5259E0',
    500: '#2F36C6',
    600: '#2B3196',
    700: '#25286A',
    800: '#1C1E45',
    900: '#13142A',
  },
}

$base: #252FEF;
$base-ink: #FFFFFF;
$base-50: #F0F1FE;
$base-100: #D8DAFD;
$base-200: #B3B7F9;
$base-300: #8086EF;
$base-400: #5259E0;
$base-500: #2F36C6;
$base-600: #2B3196;
$base-700: #25286A;
$base-800: #1C1E45;
$base-900: #13142A;
$base-hover: #0F19CD;
$base-subtle: #C5C7F3;

{
    "color": {
        "base": {
            "value": "#252FEF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F1FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DAFD",
                "type": "color"
            },
            "200": {
                "value": "#B3B7F9",
                "type": "color"
            },
            "300": {
                "value": "#8086EF",
                "type": "color"
            },
            "400": {
                "value": "#5259E0",
                "type": "color"
            },
            "500": {
                "value": "#2F36C6",
                "type": "color"
            },
            "600": {
                "value": "#2B3196",
                "type": "color"
            },
            "700": {
                "value": "#25286A",
                "type": "color"
            },
            "800": {
                "value": "#1C1E45",
                "type": "color"
            },
            "900": {
                "value": "#13142A",
                "type": "color"
            }
        }
    }
}

Palettes built on #252FEF

Color Lab

Pairs with #252FEF

UI roles & guardrails

In real applications

Scales

Every model

Export