#66BB6D
Closest named color: Boring Green (#63B365). oklch(71.9% 0.139 145.7), rgb(102, 187, 109).
Aa
Black text reads best on this color (8.89:1).
About this color
#66BB6D is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.139 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.023 away. Black text reads best on it, at 8.89:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.89:1 |
| White text | 2.36:1 |
Values
| HEX | #66BB6D |
| RGB | rgb(102, 187, 109) |
| HSL | hsl(125, 38%, 57%) |
| OKLCH | oklch(71.9% 0.139 145.7) |
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 #66BB6D | 2.36:1 | Fails | Lc -51.3 | Large or bold text, headings |
| Black text on #66BB6D | 8.89:1 | AAA | Lc 57.6 | Large or bold text, headings |
| #66BB6D text on white | 2.36:1 | Fails | Lc 46.4 | Large or bold text, headings |
| #66BB6D 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
#C6E2C6
oklch(88.5% 0.048 145.2)
-
Step 300
300
#9DD09F
oklch(80.9% 0.086 145.7)
-
Step 400
400 (this color)
#66BB6D
oklch(71.9% 0.139 145.7)
-
Step 500
500
#28A43E
oklch(63.1% 0.177 145.7)
-
Step 600
600
#008C29
oklch(55.7% 0.172 145.7)
-
Step 700
700
#007621
oklch(49.2% 0.152 145.7)
-
Step 800
800
#00611A
oklch(42.9% 0.132 145.8)
-
Step 900
900
#015114
oklch(37.9% 0.116 145.6)
-
Step 950
950
#072F0E
oklch(26.9% 0.072 146.1)
#66BB6D 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) | #BEAE67 | 0.108 |
| Deuteranopia (no green cones) | #B1A572 | 0.107 |
| Tritanopia (no blue cones) | #5AB7A8 | 0.084 |
| Achromatopsia (no color) | #A9A9A9 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB6D
#66BB6D
oklch(71.9% 0.139 145.7)
- #D084D3
#D084D3
oklch(71.9% 0.139 325.6)
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 #66BB6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.023
- Dark Mint #48C072 ΔE 0.023
- Soft Green #6FC276 ΔE 0.023
- Turtle Green #75B84F ΔE 0.031
- Faded Green #7BB274 ΔE 0.036
- Dark Mint Green #20C073 ΔE 0.039
- Cool Green #33B864 ΔE 0.041
- Algae Green #21C36F ΔE 0.042
Use #66BB6D 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.