#668D51
Closest named color: Light Forest Green (#4F9153). oklch(59.9% 0.097 135.3), rgb(102, 141, 81).
Aa
Black text reads best on this color (5.49:1).
About this color
#668D51 is a medium-dark, moderately saturated green. In OKLCH its lightness is 60%, its chroma 0.097 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Forest Green (#4F9153), ΔE 0.026 away. Black text reads best on it, at 5.49:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Light Forest Green (#4F9153) |
| Black text | 5.49:1 |
| White text | 3.82:1 |
Values
| HEX | #668D51 |
| RGB | rgb(102, 141, 81) |
| HSL | hsl(99, 27%, 44%) |
| OKLCH | oklch(59.9% 0.097 135.3) |
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 #668D51 | 3.82:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #668D51 | 5.49:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #668D51 text on white | 3.82:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #668D51 text on black | 5.49:1 | AA | Lc -36.0 | 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
#F4F6F2
oklch(97.1% 0.006 128.5)
-
Step 100
100
#E6ECE3
oklch(93.6% 0.014 134.9)
-
Step 200
200
#D2DDCC
oklch(88.4% 0.026 134.3)
-
Step 300
300
#B4C8AA
oklch(80.9% 0.047 135.1)
-
Step 400
400
#8CAC7C
oklch(70.8% 0.076 135.4)
-
Step 500
500 (this color)
#668D51
oklch(59.9% 0.097 135.3)
-
Step 600
600
#578140
oklch(55.6% 0.105 135.5)
-
Step 700
700
#476D31
oklch(49.1% 0.098 135.3)
-
Step 800
800
#3B592A
oklch(42.8% 0.081 135.3)
-
Step 900
900
#324926
oklch(37.6% 0.063 135.6)
-
Step 950
950
#1E2B17
oklch(27.1% 0.04 135.2)
#668D51 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) | #91854C | 0.061 |
| Deuteranopia (no green cones) | #8B8154 | 0.061 |
| Tritanopia (no blue cones) | #66897E | 0.068 |
| Achromatopsia (no color) | #828282 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668D51
#668D51
oklch(59.9% 0.097 135.3)
- #966EA7
#966EA7
oklch(59.9% 0.096 315.5)
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 #668D51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Forest Green #4F9153 ΔE 0.026
- Moss Green #658B38 ΔE 0.027
- Khaki Green #728639 ΔE 0.028
- Fern Green #548D44 ΔE 0.028
- Drab Green #749551 ΔE 0.031
- Dark Sage #598556 ΔE 0.032
- Swamp #698339 ΔE 0.033
- Camo #7F8F4E ΔE 0.034
Use #668D51 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.