#66BC49
Closest named color: Turtle Green (#75B84F). oklch(71.6% 0.173 138.6), rgb(102, 188, 73).
Aa
Black text reads best on this color (8.85:1).
About this color
#66BC49 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.173 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.020 away. Black text reads best on it, at 8.85:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 8.85:1 |
| White text | 2.37:1 |
Values
| HEX | #66BC49 |
| RGB | rgb(102, 188, 73) |
| HSL | hsl(105, 46%, 51%) |
| OKLCH | oklch(71.6% 0.173 138.6) |
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 #66BC49 | 2.37:1 | Fails | Lc -51.4 | Large or bold text, headings |
| Black text on #66BC49 | 8.85:1 | AAA | Lc 57.5 | Large or bold text, headings |
| #66BC49 text on white | 2.37:1 | Fails | Lc 46.5 | Large or bold text, headings |
| #66BC49 text on black | 8.85:1 | AAA | Lc -55.6 | 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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E0EFDB
oklch(93.5% 0.031 137.8)
-
Step 200
200
#C6E3BD
oklch(88.5% 0.06 138.3)
-
Step 300
300
#9DD28D
oklch(81% 0.109 138.6)
-
Step 400
400 (this color)
#66BC49
oklch(71.6% 0.173 138.6)
-
Step 500
500
#3DA300
oklch(63% 0.197 138.7)
-
Step 600
600
#328900
oklch(55.5% 0.174 138.7)
-
Step 700
700
#297400
oklch(49.2% 0.154 138.7)
-
Step 800
800
#205F00
oklch(42.8% 0.134 138.7)
-
Step 900
900
#1A4F00
oklch(37.7% 0.118 138.5)
-
Step 950
950
#0C2F00
oklch(26.9% 0.084 138.6)
#66BC49 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) | #C1AD3C | 0.114 |
| Deuteranopia (no green cones) | #B6A552 | 0.116 |
| Tritanopia (no blue cones) | #60B6A3 | 0.118 |
| Achromatopsia (no color) | #A8A8A8 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BC49
#66BC49
oklch(71.6% 0.173 138.6)
- #D07CE8
#D07CE8
oklch(71.6% 0.173 318.4)
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 #66BC49, closest first.
No curated palette has a color within ΔE 0.04 of #66BC49.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.020
- Leafy Green #51B73B ΔE 0.028
- Dark Lime Green #7EBD01 ΔE 0.038
- Dark Lime #84B701 ΔE 0.038
- Frog Green #58BC08 ΔE 0.040
- Dark Mint #48C072 ΔE 0.042
- Boring Green #63B365 ΔE 0.045
- Cool Green #33B864 ΔE 0.045
Use #66BC49 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.