#668B6B
Closest named color: Slate Green (#658D6D). oklch(60% 0.064 148.3), rgb(102, 139, 107).
Aa
Black text reads best on this color (5.47:1).
About this color
#668B6B is a medium-dark, muted green. In OKLCH its lightness is 60%, its chroma 0.064 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.006 away. Black text reads best on it, at 5.47:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #668B6B |
| RGB | rgb(102, 139, 107) |
| HSL | hsl(128, 15%, 47%) |
| OKLCH | oklch(60% 0.064 148.3) |
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 #668B6B | 3.83:1 | AA large text | Lc -71.3 | Content text, not long reading |
| Black text on #668B6B | 5.47:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #668B6B text on white | 3.83:1 | AA large text | Lc 65.8 | Content text, not long reading |
| #668B6B text on black | 5.47:1 | AA | Lc -35.8 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E6ECE6
oklch(93.7% 0.01 145.5)
-
Step 200
200
#D2DCD3
oklch(88.4% 0.016 148.4)
-
Step 300
300
#B4C6B6
oklch(80.8% 0.03 148.5)
-
Step 400
400
#8CAA90
oklch(70.8% 0.05 148.8)
-
Step 500
500 (this color)
#668B6B
oklch(60% 0.064 148.3)
-
Step 600
600
#577F5D
oklch(55.7% 0.069 148.5)
-
Step 700
700
#476B4C
oklch(49.1% 0.064 148.1)
-
Step 800
800
#3A573F
oklch(42.6% 0.053 149.1)
-
Step 900
900
#324835
oklch(37.7% 0.042 148.3)
-
Step 950
950
#1E2A1F
oklch(27% 0.026 147)
#668B6B 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) | #8C8569 | 0.053 |
| Deuteranopia (no green cones) | #86816D | 0.051 |
| Tritanopia (no blue cones) | #618982 | 0.037 |
| Achromatopsia (no color) | #828282 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668B6B
#668B6B
oklch(60% 0.064 148.3)
- #967393
#967393
oklch(60.1% 0.063 329.2)
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 #668B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.006
- Green Grey #77926F ΔE 0.031
- Dark Sage #598556 ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.040
- Ocean Green #3D9973 ΔE 0.050
- Camo #7F8F4E ΔE 0.051
- Light Forest Green #4F9153 ΔE 0.051
- Grey Teal #5E9B8A ΔE 0.053
Use #668B6B 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.