#66B391
Closest named color: Greeny Blue (#42B395). oklch(70.7% 0.092 163.8), rgb(102, 179, 145).
Aa
Black text reads best on this color (8.42:1).
About this color
#66B391 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.092 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.027 away. Black text reads best on it, at 8.42:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.42:1 |
| White text | 2.49:1 |
Values
| HEX | #66B391 |
| RGB | rgb(102, 179, 145) |
| HSL | hsl(154, 34%, 55%) |
| OKLCH | oklch(70.7% 0.092 163.8) |
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 #66B391 | 2.49:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #66B391 | 8.42:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #66B391 text on white | 2.49:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #66B391 text on black | 8.42:1 | AAA | Lc -53.1 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E0EEE7
oklch(93.7% 0.018 164.6)
-
Step 200
200
#C7E0D3
oklch(88.5% 0.032 163.2)
-
Step 300
300
#9FCDB7
oklch(80.9% 0.057 164.2)
-
Step 400
400 (this color)
#66B391
oklch(70.7% 0.092 163.8)
-
Step 500
500
#309F76
oklch(63% 0.117 164.2)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#074E36
oklch(37.7% 0.077 163.7)
-
Step 950
950
#0A2E20
oklch(27.1% 0.049 163.7)
#66B391 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) | #B0A98F | 0.090 |
| Deuteranopia (no green cones) | #A4A093 | 0.088 |
| Tritanopia (no blue cones) | #51B3A9 | 0.036 |
| Achromatopsia (no color) | #A4A4A4 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B391
#66B391
oklch(70.7% 0.092 163.8)
- #CA89AF
#CA89AF
oklch(70.7% 0.093 343.8)
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 #66B391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.027
- Tea #65AB7C ΔE 0.031
- Faded Green #7BB274 ΔE 0.040
- Dusty Green #76A973 ΔE 0.041
- Sage Green #88B378 ΔE 0.045
- Sage #87AE73 ΔE 0.045
- Muted Teal #90B494 ΔE 0.047
- Lichen #8FB67B ΔE 0.052
Use #66B391 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.