#668C40
Closest named color: Moss Green (#658B38). oklch(59.4% 0.113 131.1), rgb(102, 140, 64).
Aa
Black text reads best on this color (5.39:1).
About this color
#668C40 is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Moss Green (#658B38), ΔE 0.008 away. Black text reads best on it, at 5.39:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Moss Green (#658B38) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #668C40 |
| RGB | rgb(102, 140, 64) |
| HSL | hsl(90, 37%, 40%) |
| OKLCH | oklch(59.4% 0.113 131.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #668C40 | 3.89:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #668C40 | 5.39:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #668C40 text on white | 3.89:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #668C40 text on black | 5.39:1 | AA | Lc -35.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E6ECE1
oklch(93.5% 0.016 130.4)
-
Step 200
200
#D2DEC9
oklch(88.6% 0.031 131.6)
-
Step 300
300
#B4C9A3
oklch(81% 0.057 131.2)
-
Step 400
400
#8DAC71
oklch(70.6% 0.089 130.9)
-
Step 500
500 (this color)
#668C40
oklch(59.4% 0.113 131.1)
-
Step 600
600
#59812C
oklch(55.5% 0.123 130.9)
-
Step 700
700
#496D1F
oklch(49% 0.114 131)
-
Step 800
800
#3C591C
oklch(42.7% 0.094 131.1)
-
Step 900
900
#33491D
oklch(37.6% 0.073 131.2)
-
Step 950
950
#1E2B12
oklch(27% 0.047 131.4)
#668C40 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #928339 | 0.064 |
| Deuteranopia (no green cones) | #8C8045 | 0.064 |
| Tritanopia (no blue cones) | #68877B | 0.086 |
| Achromatopsia (no color) | #818181 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668C40
#668C40
oklch(59.4% 0.113 131.1)
- #946AB0
#946AB0
oklch(59.4% 0.113 310.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #668C40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Moss Green #658B38 ΔE 0.008
- Fern Green #548D44 ΔE 0.020
- Khaki Green #728639 ΔE 0.020
- Mossy Green #638B27 ΔE 0.023
- Swamp #698339 ΔE 0.025
- Olive Drab #6B8E23 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.028
- Drab Green #749551 ΔE 0.036
Use #668C40 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.