#66BB06
Closest named color: Frog Green (#58BC08). oklch(71% 0.204 134.4), rgb(102, 187, 6).
Aa
Black text reads best on this color (8.67:1).
About this color
#66BB06 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.204 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Frog Green (#58BC08), ΔE 0.012 away. Black text reads best on it, at 8.67:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.204) |
| Temperature | in between |
| Nearest name | Frog Green (#58BC08) |
| Black text | 8.67:1 |
| White text | 2.42:1 |
Values
| HEX | #66BB06 |
| RGB | rgb(102, 187, 6) |
| HSL | hsl(88, 94%, 38%) |
| OKLCH | oklch(71% 0.204 134.4) |
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 #66BB06 | 2.42:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #66BB06 | 8.67:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #66BB06 text on white | 2.42:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #66BB06 text on black | 8.67:1 | AAA | Lc -54.7 | 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
#F1F8ED
oklch(97.1% 0.016 133.8)
-
Step 100
100
#E0F0D7
oklch(93.7% 0.037 134.1)
-
Step 200
200
#C6E4B5
oklch(88.5% 0.071 134.3)
-
Step 300
300
#9ED37D
oklch(81% 0.127 134.3)
-
Step 400
400 (this color)
#66BB06
oklch(71% 0.204 134.4)
-
Step 500
500
#56A000
oklch(63.2% 0.183 134.3)
-
Step 600
600
#478600
oklch(55.6% 0.16 134.3)
-
Step 700
700
#3B7100
oklch(49.2% 0.142 134.3)
-
Step 800
800
#2F5D00
oklch(42.8% 0.124 134.5)
-
Step 900
900
#264D00
oklch(37.6% 0.109 134.4)
-
Step 950
950
#142E00
oklch(27% 0.078 134.6)
#66BB06 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) | #C3AB00 | 0.122 |
| Deuteranopia (no green cones) | #B7A428 | 0.119 |
| Tritanopia (no blue cones) | #64B39F | 0.151 |
| Achromatopsia (no color) | #A6A6A6 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB06
#66BB06
oklch(71% 0.204 134.4)
- #CF73F8
#CF73F8
oklch(71% 0.204 314.3)
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 #66BB06, closest first.
No curated palette has a color within ΔE 0.04 of #66BB06.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Frog Green #58BC08 ΔE 0.012
- Dark Lime Green #7EBD01 ΔE 0.026
- Leafy Green #51B73B ΔE 0.031
- Dark Lime #84B701 ΔE 0.032
- Apple #6ECB3C ΔE 0.048
- Shamrock Green #02C14D ΔE 0.048
- Turtle Green #75B84F ΔE 0.049
- Grass #5CAC2D ΔE 0.050
Use #66BB06 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.