What color is #290FF0?

#290FF0 is a medium, vivid indigo. In RGB it is rgb(41, 15, 240), and in HSL hsl(247, 88%, 50%).

Is #290FF0 accessible as text?

On white, #290FF0 has a contrast ratio of 8.67:1 (passes WCAG AA for body text); on black it is 2.42:1 (fails). For text placed on #290FF0, use white for the best readability.

What is the closest Tailwind color to #290FF0?

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

What colors go well with #290FF0?

#290FF0 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D6F00F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #290FF0 below.

Is #290FF0 good for buttons?

#290FF0 works well for buttons and highlights, but use white text on #290FF0 — black text only reaches 2.42:1, below the 4.5:1 needed for normal-size labels.

Is #290FF0 the same as CSS blue?

No — #290FF0 is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#290FF0 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #290FF0

Not just a swatch — here's how #290FF0 works with other colors. Named schemes with #290FF0 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #290FF0 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #405AFF

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 #290FF0 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 #290FF0 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 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 #290FF0 Secondary #6479B9 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 #290FF0 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.

Build a working theme in the generator →

Color Lab

How #290FF0 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 20/100

Low

Firm and assertive — carries weight and contrast.

Depth 63/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 0/100

Very low

Clean and current — no dusty, aged cast.

Luxury 49/100

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 37/100

Low

Workable accent with care around contrast.

Surface fit 11/100

Very low

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

Print safety 50/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #290FF0

For UI

For branding

For interior

For fashion

People also use #290FF0 with

Dodger Blue Electric Purple Pear 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 8.7:1. Use

Subtle surface Use #D9D5F6 for cards and hover fills. Tint 80

Avoid beside #740FF0 — 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 #290FF0 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: #290FF0;
  --color-base-rgb: 41 15 240;
  --color-base-oklch: oklch(44.8% 0.288 269.2);
  --color-50: #F2F0FE;
  --color-100: #DCD8FD;
  --color-200: #BBB2FA;
  --color-300: #8C7FF0;
  --color-400: #6150E2;
  --color-500: #3F2DC8;
  --color-600: #372A98;
  --color-700: #2C246B;
  --color-800: #201B46;
  --color-900: #15132B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultramarine: {
    50: '#F2F0FE',
    100: '#DCD8FD',
    200: '#BBB2FA',
    300: '#8C7FF0',
    400: '#6150E2',
    500: '#3F2DC8',
    600: '#372A98',
    700: '#2C246B',
    800: '#201B46',
    900: '#15132B',
  },
}

$base: #290FF0;
$base-ink: #FFFFFF;
$base-50: #F2F0FE;
$base-100: #DCD8FD;
$base-200: #BBB2FA;
$base-300: #8C7FF0;
$base-400: #6150E2;
$base-500: #3F2DC8;
$base-600: #372A98;
$base-700: #2C246B;
$base-800: #201B46;
$base-900: #15132B;
$base-hover: #210CC0;
$base-subtle: #C5BFF2;

{
    "color": {
        "base": {
            "value": "#290FF0",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DCD8FD",
                "type": "color"
            },
            "200": {
                "value": "#BBB2FA",
                "type": "color"
            },
            "300": {
                "value": "#8C7FF0",
                "type": "color"
            },
            "400": {
                "value": "#6150E2",
                "type": "color"
            },
            "500": {
                "value": "#3F2DC8",
                "type": "color"
            },
            "600": {
                "value": "#372A98",
                "type": "color"
            },
            "700": {
                "value": "#2C246B",
                "type": "color"
            },
            "800": {
                "value": "#201B46",
                "type": "color"
            },
            "900": {
                "value": "#15132B",
                "type": "color"
            }
        }
    }
}

Palettes built on #290FF0

Color Lab

Pairs with #290FF0

UI roles & guardrails

In real applications

Scales

Every model

Export