#66BB6E
Closest named color: Soft Green (#6FC276). oklch(71.9% 0.138 146), rgb(102, 187, 110).
Aa
Black text reads best on this color (8.89:1).
About this color
#66BB6E is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.138 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.023 away. Black text reads best on it, at 8.89:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 8.89:1 |
| White text | 2.36:1 |
Values
| HEX | #66BB6E |
| RGB | rgb(102, 187, 110) |
| HSL | hsl(126, 38%, 57%) |
| OKLCH | oklch(71.9% 0.138 146) |
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 #66BB6E | 2.36:1 | Fails | Lc -51.3 | Large or bold text, headings |
| Black text on #66BB6E | 8.89:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #66BB6E text on white | 2.36:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #66BB6E text on black | 8.89:1 | AAA | Lc -55.7 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#E0EFE0
oklch(93.7% 0.026 145.4)
-
Step 200
200
#C6E2C7
oklch(88.5% 0.047 146.1)
-
Step 300
300
#9DD09F
oklch(80.9% 0.086 145.7)
-
Step 400
400 (this color)
#66BB6E
oklch(71.9% 0.138 146)
-
Step 500
500
#27A440
oklch(63.1% 0.176 146.1)
-
Step 600
600
#008C2B
oklch(55.7% 0.17 146)
-
Step 700
700
#007623
oklch(49.2% 0.15 146)
-
Step 800
800
#00601B
oklch(42.6% 0.13 146.1)
-
Step 900
900
#015015
oklch(37.5% 0.114 145.9)
-
Step 950
950
#072F0E
oklch(26.9% 0.072 146.1)
#66BB6E 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) | #BDAE68 | 0.107 |
| Deuteranopia (no green cones) | #B1A673 | 0.105 |
| Tritanopia (no blue cones) | #59B7A8 | 0.083 |
| Achromatopsia (no color) | #A9A9A9 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB6E
#66BB6E
oklch(71.9% 0.138 146)
- #D084D2
#D084D2
oklch(71.8% 0.138 326)
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 #66BB6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.023
- Boring Green #63B365 ΔE 0.023
- Dark Mint #48C072 ΔE 0.024
- Turtle Green #75B84F ΔE 0.032
- Faded Green #7BB274 ΔE 0.035
- Dark Mint Green #20C073 ΔE 0.039
- Cool Green #33B864 ΔE 0.041
- Medium Sea Green #3CB371 ΔE 0.042
Use #66BB6E 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.