Green
Cobalt Green
Cobalt Green
#66FF59Click to copy
Cobalt Green Parameter Conversion Table
More converters →HEX#66FF59Copy
RGBrgb(102, 255, 89)Copy
HSLhsl(115, 100%, 67%)Copy
HSV/HSBhsv(115, 65%, 100%)Copy
CMYKcmyk(60%, 0%, 65%, 0%)Copy
Cobalt Green Color Schemes
Complementary
#66FF59
Click to copy#F259FF
Click to copyAnalogous
#B9FF59
Click to copy#59FF9F
Click to copySplit Complementary
#9F59FF
Click to copy#FF59B9
Click to copyMonochromatic
#66FF59
Click to copy#C8FAC4
Click to copy#FFFFFF
Click to copy#13F200
Click to copy#0B8C00
Click to copy#032600
Click to copyCobalt Green WCAG Accessibility Contrast
WCAG Calculator →The contrast ratio of this color against common foreground/background colors (based on the WCAG 2.1 standard)
Sample text Aa
White background #FFFFFF
1.31 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Black background #000000
16.01 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Light gray background #F5F5F5
1.20 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Dark gray background #333333
9.63 : 1
AA NormalAA LargeAAA NormalAAA Large
Cobalt Green Shade Variants
Gradient Generator →Lighten with White Mixed with white for a lighter, softer color
10%
20%
30%
40%
50%
60%
70%
80%
90%
Darken with Black Mixed with black for a deeper, heavier color
10%
20%
30%
40%
50%
60%
70%
80%
90%
Muted / Morandi Mixed with gray and desaturated for a sophisticated muted tone
10%
20%
30%
40%
50%
60%
70%
80%
90%
Cobalt Green Color Introduction
Definition
Cobalt Green (HEX #66FF59) has the RGB value rgb(102, 255, 89), the HSL value hsl(115°, 100%, 67%) and the CMYK print value cmyk(60%, 0%, 65%, 0%). In terms of color schemes, the complement of Cobalt Green is #F259FF, and placing the two side by side produces a striking, eye-catching contrast; paired with the analogous colors #B9FF59 and #59FF9F that sit next to it on the color wheel, it transitions naturally and harmoniously; in a split-complementary scheme (#9F59FF, #FF59B9) it keeps its contrast tension without losing layering; and a monochromatic scheme built on Cobalt Green uses gradients of lightness and saturation to create a unified design with a strong sense of depth. Under the WCAG accessibility standard, Cobalt Green has a contrast ratio of 1.31:1 against white and 16.01:1 against black; paired with a black background it reaches AAA, making it ideal for text and accent colors in dark mode.
Color Characteristics
Green is the base color of nature, evoking forests, lawns and new plants. Calm yet full of life, it carries a natural sense of trust in environmental, health and finance sectors. Specifically, Cobalt Green has a lightness of 67% and a saturation of 100%, bright and airy, ideal as a light background or accent color that creates a soft, comfortable atmosphere; moreover, its saturation is extremely high and its visual tension is strong, so it works best used sparingly as a focal accent. In a word: A pigment color containing the element cobalt.
Color Psychology
Green can evoke relaxation, safety and balance, with a marked soothing effect; psychologically it symbolizes nature, health and hope. For this reason Cobalt Green tends to leave a first impression of being calm and natural in the viewer’s mind, and this emotional tone also defines the role it plays in design.
Best Uses
Green suits environmental campaigns, healthcare, tea brands and any scene that needs to convey natural trust. In real projects, Cobalt Green is also often used as a light background or supporting negative space; in “Green”-themed designs, the adjacent colors or lightness gradients built around it quickly establish a cohesive, clearly layered color scheme.
Cobalt Green Featured In
This color is included in the following color cards and color families. Click a card to browse more colors in the corresponding collection.