#688B66
Closest named color: Slate Green (#658D6D). oklch(60% 0.068 143.3), rgb(104, 139, 102).
Aa
Black text reads best on this color (5.47:1).
About this color
#688B66 is a medium-dark, muted green. In OKLCH its lightness is 60%, its chroma 0.068 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.010 away. Black text reads best on it, at 5.47:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #688B66 |
| RGB | rgb(104, 139, 102) |
| HSL | hsl(117, 15%, 47%) |
| OKLCH | oklch(60% 0.068 143.3) |
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 #688B66 | 3.83:1 | AA large text | Lc -71.3 | Content text, not long reading |
| Black text on #688B66 | 5.47:1 | AA | Lc 38.3 | Non-text elements, placeholder text |
| #688B66 text on white | 3.83:1 | AA large text | Lc 65.8 | Content text, not long reading |
| #688B66 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
#F4F6F3
oklch(97.1% 0.004 134.8)
-
Step 100
100
#E6ECE6
oklch(93.7% 0.01 145.5)
-
Step 200
200
#D2DCD1
oklch(88.4% 0.018 142.8)
-
Step 300
300
#B5C7B3
oklch(81% 0.034 142.5)
-
Step 400
400
#8EAA8C
oklch(70.8% 0.053 143.2)
-
Step 500
500 (this color)
#688B66
oklch(60% 0.068 143.3)
-
Step 600
600
#597F57
oklch(55.7% 0.074 143.3)
-
Step 700
700
#496B47
oklch(49.1% 0.069 143.1)
-
Step 800
800
#3C573B
oklch(42.7% 0.056 143.7)
-
Step 900
900
#334832
oklch(37.7% 0.045 143.5)
-
Step 950
950
#1E2A1E
oklch(27% 0.027 144.8)
#688B66 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) | #8D8464 | 0.053 |
| Deuteranopia (no green cones) | #878168 | 0.051 |
| Tritanopia (no blue cones) | #658981 | 0.042 |
| Achromatopsia (no color) | #828282 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688B66
#688B66
oklch(60% 0.068 143.3)
- #947398
#947398
oklch(60% 0.067 322.8)
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 #688B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.010
- Green Grey #77926F ΔE 0.031
- Dark Sage #598556 ΔE 0.033
- Camo #7F8F4E ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.047
- Light Forest Green #4F9153 ΔE 0.047
- Drab #828344 ΔE 0.048
- Drab Green #749551 ΔE 0.048
Use #688B66 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.