#66BB45
Closest named color: Turtle Green (#75B84F). oklch(71.3% 0.175 138.1), rgb(102, 187, 69).
Aa
Black text reads best on this color (8.75:1).
About this color
#66BB45 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.175 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.021 away. Black text reads best on it, at 8.75:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 8.75:1 |
| White text | 2.39:1 |
Values
| HEX | #66BB45 |
| RGB | rgb(102, 187, 69) |
| HSL | hsl(103, 46%, 50%) |
| OKLCH | oklch(71.3% 0.175 138.1) |
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 #66BB45 | 2.39:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #66BB45 | 8.75:1 | AAA | Lc 57.0 | Large or bold text, headings |
| #66BB45 text on white | 2.39:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #66BB45 text on black | 8.75:1 | AAA | Lc -55.1 | 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
#F1F8EE
oklch(97.1% 0.015 136.1)
-
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
#9DD28C
oklch(80.9% 0.11 138.3)
-
Step 400
400 (this color)
#66BB45
oklch(71.3% 0.175 138.1)
-
Step 500
500
#41A300
oklch(63.2% 0.196 138.1)
-
Step 600
600
#368900
oklch(55.6% 0.172 138)
-
Step 700
700
#2C7300
oklch(49.1% 0.152 138.1)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1C4F00
oklch(37.8% 0.117 138)
-
Step 950
950
#0D2F00
oklch(26.9% 0.084 138.2)
#66BB45 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) | #C1AC37 | 0.114 |
| Deuteranopia (no green cones) | #B5A54F | 0.114 |
| Tritanopia (no blue cones) | #60B5A2 | 0.120 |
| Achromatopsia (no color) | #A7A7A7 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB45
#66BB45
oklch(71.3% 0.175 138.1)
- #CF7BE8
#CF7BE8
oklch(71.3% 0.175 318.1)
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 #66BB45, closest first.
No curated palette has a color within ΔE 0.04 of #66BB45.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.021
- Leafy Green #51B73B ΔE 0.025
- Dark Lime #84B701 ΔE 0.036
- Dark Lime Green #7EBD01 ΔE 0.036
- Frog Green #58BC08 ΔE 0.037
- Dark Mint #48C072 ΔE 0.045
- Shamrock Green #02C14D ΔE 0.045
- Cool Green #33B864 ΔE 0.045
Use #66BB45 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.