#3F4557 Charcoal Blue

What are the RGB, HSL, OKLCH and CMYK values of #3F4557?

HEX

#3F4557

RGB

rgb(63, 69, 87)

HSL

hsl(225, 16%, 29%)

OKLCH

oklch(39.2% 0.032 270)

CMYK

28, 21, 0, 66

#3F4557 has a contrast ratio of 9.54:1 against white and 2.20:1 against black, so white is the better background for text in this color and light text reads best on it.

Contrast checker

Text color (rows) on background (columns), scored against WCAG 2.2. White and near-black text on this color.

AAA ≥ 7:1 · AA ≥ 4.5:1 body text· AA18 ≥ 3:1 large text (18pt, or 14pt bold) only

Tints and shades of #3F4557

Same hue and chroma in OKLCH, lighter to darker.

1. #F1F5FF
2. #CDD5EB
3. #AFB6CB
4. #9198AD
5. #747B8F
6. #595F73
7. #3F4557
8. #272C3D
9. #111524

Colors that go with #3F4557

Six harmony rules built from this color. Open any in the Studio.

• AnalogousNeighboring hues. Calm and cohesive, with little tension.
• ComplementaryOpposite hues. Maximum contrast — strong for accents.
• SplitA hue plus the two neighbors of its opposite. Contrast without the clash.
• TriadicThree evenly spaced hues. Vivid and balanced.
• TetradicFour hues in two complementary pairs. Rich, and easy to overuse.
• MonoOne hue across a range of lightness. Always harmonious.

Color blindness check

About 1 in 12 men and 1 in 200 women see color differently. Simulated with the Machado (2009) model.

No green cones — the most common form. No two swatches become hard to tell apart here.

Palettes, gradients and meshes with #3F4557

Items using this color or one perceptually close to it, closest first.