006400 (darkgreen) — RGB, HSL, CMYK and Contrast

Q: What text colour should sit on 006400?

Black gives 2.82:1 and white gives 7.44:1, so white wins at 7.44:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Every value recomputed from the hex code · WCAG 2.1 contrast ratios

A green at 20% lightness and 100% saturation, which puts it at 7.44:1 against white and 2.82:1 against black. The tables below give the notation conversions, the tints and shades that keep the hue intact, and the harmonies that pair with it.

006400

Notation conversions

Notation	Value
HEX	`006400`
RGB	rgb(0, 100, 0)
HSL	hsl(120, 100%, 20%)
CMYK	cmyk(100%, 0%, 100%, 61%)
Relative luminance	0.0911
Perceived brightness	23.0 / 100

R=0 G=100 B=0 · hue 120.0° · saturation 100.0% · lightness 19.6%

Contrast against pure white and pure black

Pair this colour with the two extremes to see which is the safer text partner. AA needs 4.5:1 for body text and 3:1 for large text; AAA raises that to 7:1 and 4.5:1.

Against	Hex	Ratio	AA text	AA large	AAA text
#FFFFFF	`white`	7.44:1	pass	pass	pass
#000000	`black`	2.82:1	fail	fail	fail

Tints and shades

Lightness moves in ten-point steps while hue and saturation stay fixed, which keeps the colour recognisable in a scale. The last column is the ratio against white text, useful for deciding where a scale stops working as a background.

Step	Hex	HSL	vs white text
shade -30	`#000000`	hsl(120, 100%, 0%)	21.00:1
shade -20	`#000000`	hsl(120, 100%, 0%)	21.00:1
shade -10	`#003100`	hsl(120, 100%, 10%)	14.59:1
tint +10	`#009700`	hsl(120, 100%, 30%)	3.87:1
tint +20	`#00ca00`	hsl(120, 100%, 40%)	2.22:1
tint +30	`#00fd00`	hsl(120, 100%, 50%)	1.40:1

Harmonies

Scheme	Hex
Complementary	`#640064`
Analogous −30	`#326400`
Analogous +30	`#006432`
Triadic −120	`#640000`
Triadic +120	`#000064`

Take the channels apart and the numbers hold together: 0, 100 and 0 average 33, the strongest channel is 100 and the weakest 0, and that span is what pushes saturation to 100.0% at hue 120.0° and lightness 19.6%. Luminance 0.0911 with perceived brightness 23.0 out of 100 is why the white ratio (7.44:1) and the black ratio (2.82:1) diverge by 4.62. Entry 22 of 69, it steps to #000000 at minus thirty and #00fd00 at plus thirty.

Nearby colours

F0E68C khaki F5F5DC beige FFFFF0 ivory 008000 green 2E8B57 seagreen 4CAF50 Green 500

Frequently asked questions

What text colour should sit on 006400?
Black gives 2.82:1 and white gives 7.44:1, so white wins at 7.44:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Do the CMYK numbers match a print workflow?
They are the naive conversion from RGB, which assumes no ink limit, no colour profile and no black generation strategy. Real print work needs a profile-aware conversion; the values here are the ones the converter reports and are best used as a starting point for a designer rather than a press-ready separations file.

Convert any other colour, or test a pair against each other, in the ColrShift colour converter and contrast checker. The colour library groups every entry on this site by hue family.