#668C78
Closest named color: Slate Green (#658D6D). oklch(60.6% 0.052 161.4), rgb(102, 140, 120).
Aa
Black text reads best on this color (5.58:1).
About this color
#668C78 is a medium-dark, muted green. In OKLCH its lightness is 61%, its chroma 0.052 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.018 away. Black text reads best on it, at 5.58:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.052) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.58:1 |
| White text | 3.75:1 |
Values
| HEX | #668C78 |
| RGB | rgb(102, 140, 120) |
| HSL | hsl(148, 16%, 47%) |
| OKLCH | oklch(60.6% 0.052 161.4) |
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 #668C78 | 3.75:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #668C78 | 5.58:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #668C78 text on white | 3.75:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #668C78 text on black | 5.58:1 | AA | Lc -36.6 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D1DCD6
oklch(88.4% 0.014 162.4)
-
Step 300
300
#B3C6BB
oklch(80.9% 0.026 160.4)
-
Step 400
400
#8BA999
oklch(70.7% 0.04 161.9)
-
Step 500
500 (this color)
#668C78
oklch(60.6% 0.052 161.4)
-
Step 600
600
#557E69
oklch(55.6% 0.056 161.5)
-
Step 700
700
#456A57
oklch(49% 0.052 161.3)
-
Step 800
800
#395747
oklch(42.8% 0.045 160.4)
-
Step 900
900
#31473C
oklch(37.6% 0.033 162.5)
-
Step 950
950
#1D2A23
oklch(27% 0.022 160.9)
#668C78 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) | #8B8677 | 0.051 |
| Deuteranopia (no green cones) | #848279 | 0.048 |
| Tritanopia (no blue cones) | #5E8C86 | 0.022 |
| Achromatopsia (no color) | #848484 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668C78
#668C78
oklch(60.6% 0.052 161.4)
- #98768B
#98768B
oklch(60.6% 0.052 341.2)
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 #668C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.018
- Dusty Teal #4C9085 ΔE 0.029
- Green Grey #77926F ΔE 0.033
- Grey Teal #5E9B8A ΔE 0.043
- Steel Grey #6F828A ΔE 0.048
- Medium Grey #7D7F7C ΔE 0.049
- Sea #3C9992 ΔE 0.052
- Dull Teal #5F9E8F ΔE 0.052
Use #668C78 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.