#66D183
Closest named color: Soft Green (#6FC276). oklch(77.8% 0.149 150.4), rgb(102, 209, 131).
Aa
Black text reads best on this color (11.01:1).
About this color
#66D183 is a medium-light, vivid green. In OKLCH its lightness is 78%, its chroma 0.149 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.040 away. Black text reads best on it, at 11.01:1.
| Hue family | Greens |
| Lightness | medium-light (78%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 11.01:1 |
| White text | 1.90:1 |
Values
| HEX | #66D183 |
| RGB | rgb(102, 209, 131) |
| HSL | hsl(136, 54%, 61%) |
| OKLCH | oklch(77.8% 0.149 150.4) |
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 #66D183 | 1.90:1 | Fails | Lc -40.4 | Non-text elements, placeholder text |
| Black text on #66D183 | 11.01:1 | AAA | Lc 67.8 | Content text, not long reading |
| #66D183 text on white | 1.90:1 | Fails | Lc 36.1 | Non-text elements, placeholder text |
| #66D183 text on black | 11.01:1 | AAA | Lc -66.4 | Content text, not long reading |
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 300.
-
Step 50
50
#ECFAEF
oklch(97.2% 0.021 152.2)
-
Step 100
100
#D6F3DB
oklch(93.7% 0.044 150.3)
-
Step 200
200
#B2E9BD
oklch(88.4% 0.082 150.5)
-
Step 300
300 (this color)
#66D183
oklch(77.8% 0.149 150.4)
-
Step 400
400
#00C05B
oklch(70.6% 0.193 150.4)
-
Step 500
500
#00A54D
oklch(63.1% 0.172 150.4)
-
Step 600
600
#008B40
oklch(55.7% 0.152 150.4)
-
Step 700
700
#007535
oklch(49.2% 0.134 150.5)
-
Step 800
800
#00602A
oklch(42.8% 0.117 150.4)
-
Step 900
900
#005022
oklch(37.7% 0.103 150.5)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#66D183 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) | #D2C27E | 0.125 |
| Deuteranopia (no green cones) | #C3B888 | 0.123 |
| Tritanopia (no blue cones) | #4FCEBD | 0.081 |
| Achromatopsia (no color) | #BCBCBC | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66D183
#66D183
oklch(77.8% 0.149 150.4)
- #EC91E3
#EC91E3
oklch(77.7% 0.15 330.5)
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 #66D183, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.040
- Seaweed #18D17B ΔE 0.041
- Emerald #06D6A0 ΔE 0.044
- Aqua Green #12E193 ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.057
- Dark Mint #48C072 ΔE 0.057
- Greenblue #23C48B ΔE 0.058
- Weird Green #3AE57F ΔE 0.060
Use #66D183 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.