#3BD381
Closest named color: Seaweed (#18D17B). oklch(76.9% 0.172 154.7), rgb(59, 211, 129).
Aa
Black text reads best on this color (10.82:1).
About this color
#3BD381 is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.172 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.016 away. Black text reads best on it, at 10.82:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.82:1 |
| White text | 1.94:1 |
Values
| HEX | #3BD381 |
| RGB | rgb(59, 211, 129) |
| HSL | hsl(148, 63%, 53%) |
| OKLCH | oklch(76.9% 0.172 154.7) |
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 #3BD381 | 1.94:1 | Fails | Lc -41.1 | Non-text elements, placeholder text |
| Black text on #3BD381 | 10.82:1 | AAA | Lc 67.1 | Content text, not long reading |
| #3BD381 text on white | 1.94:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #3BD381 text on black | 10.82:1 | AAA | Lc -65.7 | 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
#EAFAEF
oklch(97% 0.022 155.9)
-
Step 100
100
#D1F4DB
oklch(93.5% 0.049 154.3)
-
Step 200
200
#A6ECBD
oklch(88.4% 0.096 154.6)
-
Step 300
300 (this color)
#3BD381
oklch(76.9% 0.172 154.7)
-
Step 400
400
#00BF6D
oklch(70.7% 0.176 154.8)
-
Step 500
500
#00A45C
oklch(63.1% 0.158 154.5)
-
Step 600
600
#008A4D
oklch(55.6% 0.138 154.7)
-
Step 700
700
#007440
oklch(49.1% 0.122 154.8)
-
Step 800
800
#005F33
oklch(42.6% 0.106 154.6)
-
Step 900
900
#004F2A
oklch(37.6% 0.093 154.9)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#3BD381 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) | #D2C27B | 0.151 |
| Deuteranopia (no green cones) | #C0B586 | 0.149 |
| Tritanopia (no blue cones) | #00D1BE | 0.084 |
| Achromatopsia (no color) | #BABABA | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3BD381
#3BD381
oklch(76.9% 0.172 154.7)
- #F586E0
#F586E0
oklch(77% 0.172 334.6)
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 #3BD381, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.016
- Emerald #06D6A0 ΔE 0.038
- Aqua Green #12E193 ΔE 0.038
- Algae Green #21C36F ΔE 0.049
- Greenblue #23C48B ΔE 0.051
- Dark Mint #48C072 ΔE 0.051
- Soft Green #6FC276 ΔE 0.051
- Weird Green #3AE57F ΔE 0.052
Use #3BD381 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.