#66B577
Closest named color: Faded Green (#7BB274). oklch(70.6% 0.12 149.5), rgb(102, 181, 119).
Aa
Black text reads best on this color (8.44:1).
About this color
#66B577 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.120 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Faded Green (#7BB274), ΔE 0.021 away. Black text reads best on it, at 8.44:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Faded Green (#7BB274) |
| Black text | 8.44:1 |
| White text | 2.48:1 |
Values
| HEX | #66B577 |
| RGB | rgb(102, 181, 119) |
| HSL | hsl(133, 35%, 55%) |
| OKLCH | oklch(70.6% 0.12 149.5) |
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 #66B577 | 2.48:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #66B577 | 8.44:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #66B577 text on white | 2.48:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #66B577 text on black | 8.44:1 | AAA | Lc -53.3 | 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
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E0EEE2
oklch(93.5% 0.022 149.7)
-
Step 200
200
#C7E1CB
oklch(88.5% 0.041 149.8)
-
Step 300
300
#9FCFA7
oklch(81% 0.075 149.5)
-
Step 400
400 (this color)
#66B577
oklch(70.6% 0.12 149.5)
-
Step 500
500
#31A253
oklch(63.1% 0.153 149.4)
-
Step 600
600
#008B3C
oklch(55.6% 0.155 149.4)
-
Step 700
700
#007531
oklch(49.1% 0.138 149.3)
-
Step 800
800
#006027
oklch(42.7% 0.12 149.3)
-
Step 900
900
#094F22
oklch(37.6% 0.099 149.6)
-
Step 950
950
#0A2F14
oklch(27.1% 0.064 149)
#66B577 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) | #B6A973 | 0.100 |
| Deuteranopia (no green cones) | #AAA17B | 0.097 |
| Tritanopia (no blue cones) | #58B2A5 | 0.067 |
| Achromatopsia (no color) | #A4A4A4 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B577
#66B577
oklch(70.6% 0.12 149.5)
- #CA84C4
#CA84C4
oklch(70.6% 0.12 329.8)
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 #66B577, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Green #7BB274 ΔE 0.021
- Boring Green #63B365 ΔE 0.022
- Tea #65AB7C ΔE 0.032
- Dusty Green #76A973 ΔE 0.035
- Medium Sea Green #3CB371 ΔE 0.035
- Algae #54AC68 ΔE 0.036
- Sage Green #88B378 ΔE 0.036
- Sage #87AE73 ΔE 0.037
Use #66B577 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.