Swatch
#645403 Olive Brown
#645403 is a very dark, vivid yellow, known as Olive Brown. In RGB it’s made of 39.2% red, 32.9% green, and 1.2% blue. Its hue is 50°, with 94% saturation and 20% lightness, so it reads as a warm 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 #645403.
Split complementary
The two neighbors of the complement: contrast that’s easier to balance.
Open in the palette creator →Tetradic
Two complementary pairs: rich, best with one color in charge.
Open in the palette creator →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
7.47:1 AAABlack text on this color
2.81:1 FailThis color as text on white
7.47:1 AAAThis color as text on black
2.81:1 FailHow it looks with color blindness
About 1 in 12 men and 1 in 200 women see color differently. Here’s #645403 as they’d see it.
#645403 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 #645403
What color is #645403?
#645403 is a very dark, vivid yellow, known as Olive Brown. In RGB it’s made of 39.2% red, 32.9% green, and 1.2% blue. Its hue is 50°, with 94% saturation and 20% lightness, so it reads as a warm color. White text sits best on top of it.
What is #645403 in RGB?
#645403 is rgb(100, 84, 3): 100 red, 84 green, and 3 blue on a 0–255 scale.
What is #645403 in CMYK?
Roughly cmyk(0, 16, 97, 61). Print results depend on paper and press, so proof it before a big print run.
What Pantone is closest to #645403?
PANTONE 133 C is the closest match in our list. Screen colors and ink never match perfectly; check a physical Pantone guide.
What color goes with #645403?
Its complement #574B90 gives the strongest contrast. For something calmer, try its analogous neighbors, or its own tints and shades above.