What color is #3F4F5B?

#3F4F5B is a dark, grayish azure, closest to the named color Nightfall. It belongs to the gray family of colors.

What is the RGB value of #3F4F5B?

The RGB value is 63, 79, 91: 63 red, 79 green and 91 blue on a 0 to 255 scale.

What is the complementary color of #3F4F5B?

The complementary color is #5B4B3F, found by rotating the hue 180° on the color wheel.

Is black or white text better on #3F4F5B?

White text. Black text has a contrast ratio of 2.48:1 and white text 8.46:1. WCAG asks for at least 4.5:1 for normal text.

#3F4F5B color

#3F4F5B rgb(63, 79, 91)

Shades of gray

The hex color #3F4F5B is a dark, grayish azure.

In the RGB color model it is made of 24.7% red, 31% green and 35.7% blue (63, 79, 91).

Its hue angle is 206°, with 18% saturation and 30% lightness. For print, the CMYK equivalent is 31% cyan, 13% magenta, 0% yellow and 64% black.

The closest named color is Nightfall (#43535E), a difference of 1.5 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 8.46:1).

#3F4F5B color codes

HEX	`#3F4F5B`
RGB	`rgb(63, 79, 91)`
RGB percent	`rgb(24.7%, 31%, 35.7%)`
HSL	`hsl(206, 18%, 30%)`
HSV / HSB	`hsv(206, 31%, 36%)`
CMYK	`cmyk(31%, 13%, 0%, 64%)`
CIE LAB	`lab(32.71, -3.06, -9.08)`
CIE LCH	`lch(32.71, 9.58, 251.37)`
CIE XYZ	`xyz(6.734, 7.404, 10.97)`
Decimal	`4149083`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #3F4F5B, 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 #3F4F5B	Ratio	AA	AAA	AA large
Sample text	2.48:1	Fail	Fail	Fail
Sample text	8.46:1	Pass	Pass	Pass

#3F4F5B as text on	Ratio	AA	AAA	AA large
Sample text	8.46:1	Pass	Pass	Pass
Sample text	2.48:1	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 #3F4F5B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #3f4f5b; }
.text { color: #3f4f5b; }
.border { border: 2px solid #3f4f5b; }
.transparent { background-color: rgb(63 79 91 / 50%); }
.gradient { background: linear-gradient(to right, #3f4f5b, #3f415b); }

Background

Text color

Border

Similar colors

Questions

What color is #3F4F5B?: #3F4F5B is a dark, grayish azure, closest to the named color Nightfall. It belongs to the gray family of colors.
What is the RGB value of #3F4F5B?: The RGB value is 63, 79, 91: 63 red, 79 green and 91 blue on a 0 to 255 scale.
What is the complementary color of #3F4F5B?: The complementary color is #5B4B3F, found by rotating the hue 180° on the color wheel.
Is black or white text better on #3F4F5B?: White text. Black text has a contrast ratio of 2.48:1 and white text 8.46:1. WCAG asks for at least 4.5:1 for normal text.