What color is #51577A?

#51577A is a grayish blue, closest to the named color Deep Indigo. It belongs to the blue family of colors.

What is the RGB value of #51577A?

The RGB value is 81, 87, 122: 81 red, 87 green and 122 blue on a 0 to 255 scale.

What is the complementary color of #51577A?

The complementary color is #7A7451, found by rotating the hue 180° on the color wheel.

Is black or white text better on #51577A?

White text. Black text has a contrast ratio of 2.99:1 and white text 7.01:1. WCAG asks for at least 4.5:1 for normal text.

#51577A color

#51577A rgb(81, 87, 122)

Shades of blue

The hex color #51577A is a grayish blue.

In the RGB color model it is made of 31.8% red, 34.1% green and 47.8% blue (81, 87, 122).

Its hue angle is 231°, with 20% saturation and 40% lightness. For print, the CMYK equivalent is 34% cyan, 29% magenta, 0% yellow and 52% black.

The closest named color is Deep Indigo (#4C567A), a difference of 1.6 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 7.01:1).

#51577A color codes

HEX	`#51577A`
RGB	`rgb(81, 87, 122)`
RGB percent	`rgb(31.8%, 34.1%, 47.8%)`
HSL	`hsl(231, 20%, 40%)`
HSV / HSB	`hsv(231, 34%, 48%)`
CMYK	`cmyk(34%, 29%, 0%, 52%)`
CIE LAB	`lab(37.79, 6.63, -20.55)`
CIE LCH	`lch(37.79, 21.59, 287.89)`
CIE XYZ	`xyz(10.313, 9.971, 19.79)`
Decimal	`5330810`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #51577A, based on their position on the color wheel.

Complementary

The color opposite on the color wheel (180°). Strongest contrast.

Analogous

Neighbors 30° either side. Calm, natural combinations.

Split complementary

The two colors next to the complement (150° and 210°).

Triadic

Three colors evenly spaced, 120° apart.

Tetradic (square)

Four colors 90° apart.

Shades, tints and tones

Shades (darker, mixed with black)

Tints (lighter, mixed with white)

Tones (mixed with gray)

Contrast and accessibility

Text on #51577A	Ratio	AA	AAA	AA large
Sample text	2.99:1	Fail	Fail	Fail
Sample text	7.01:1	Pass	Pass	Pass

#51577A as text on	Ratio	AA	AAA	AA large
Sample text	7.01:1	Pass	Pass	Pass
Sample text	2.99:1	Fail	Fail	Fail

WCAG 2 asks for 4.5:1 for normal text (AA), 7:1 for AAA, and 3:1 for large text. Check other pairs.

Color blindness simulation

How #51577A looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #51577a; }
.text { color: #51577a; }
.border { border: 2px solid #51577a; }
.transparent { background-color: rgb(81 87 122 / 50%); }
.gradient { background: linear-gradient(to right, #51577a, #60517a); }

Background

Text color

Border

Similar colors

Closest common color name: Dark Slate Blue.

Questions

What color is #51577A?: #51577A is a grayish blue, closest to the named color Deep Indigo. It belongs to the blue family of colors.
What is the RGB value of #51577A?: The RGB value is 81, 87, 122: 81 red, 87 green and 122 blue on a 0 to 255 scale.
What is the complementary color of #51577A?: The complementary color is #7A7451, found by rotating the hue 180° on the color wheel.
Is black or white text better on #51577A?: White text. Black text has a contrast ratio of 2.99:1 and white text 7.01:1. WCAG asks for at least 4.5:1 for normal text.