Close to Slate Blue
#645BBF
#645BBF is a mid-tone, muted blue, close to the color Slate Blue. In RGB it’s made of 39.2% red, 35.7% green, and 74.9% blue. Its hue is 245°, with 44% saturation and 55% lightness, so it reads as a cool color. White text sits best on top of it.
Color codes
Tints, shades & tones
Tints add white, shades add black, tones add gray. Tap any one to open its page.
Tints
Shades
Tones
Color harmonies
Combinations from the color wheel, built around #645BBF.
Split complementary
The two neighbors of the complement: contrast that’s easier to balance.
Open in the palette builder →Tetradic
Two complementary pairs: rich, best with one color in charge.
Open in the palette builder →Contrast & readability
WCAG contrast ratios for text. 4.5:1 is the minimum for body text, 3:1 for large text.
White text on this color
5.54:1 AABlack text on this color
3.79:1 AA LargeThis color as text on white
5.54:1 AAThis color as text on black
3.79:1 AA LargeHow it looks with color blindness
About 1 in 12 men and 1 in 200 women see color differently. Here’s #645BBF as they’d see it.
#645BBF in use
A headline in this color
Body text stays dark for reading; the color carries buttons, links, and accents.
On a dark background
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Questions about #645BBF
What color is #645BBF?
#645BBF is a mid-tone, muted blue, close to the color Slate Blue. In RGB it’s made of 39.2% red, 35.7% green, and 74.9% blue. Its hue is 245°, with 44% saturation and 55% lightness, so it reads as a cool color. White text sits best on top of it.
What is #645BBF in RGB?
#645BBF is rgb(100, 91, 191): 100 red, 91 green, and 191 blue on a 0–255 scale.
What is #645BBF in CMYK?
Roughly cmyk(48, 52, 0, 25). Print results depend on paper and press, so proof it before a big print run.
What Pantone is closest to #645BBF?
PANTONE 2935 C is the closest match in our list. Screen colors and ink never match perfectly; check a physical Pantone guide.
What color goes with #645BBF?
Its complement #636F0A gives the strongest contrast. For something calmer, try its analogous neighbors, or its own tints and shades above.