#40CD81
Closest named color: Seaweed (#18D17B). oklch(75.5% 0.163 155.2), rgb(64, 205, 129).
Aa
Black text reads best on this color (10.26:1).
About this color
#40CD81 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.163 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.020 away. Black text reads best on it, at 10.26:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.26:1 |
| White text | 2.04:1 |
Values
| HEX | #40CD81 |
| RGB | rgb(64, 205, 129) |
| HSL | hsl(148, 59%, 53%) |
| OKLCH | oklch(75.5% 0.163 155.2) |
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 #40CD81 | 2.04:1 | Fails | Lc -43.9 | Non-text elements, placeholder text |
| Black text on #40CD81 | 10.26:1 | AAA | Lc 64.5 | Content text, not long reading |
| #40CD81 text on white | 2.04:1 | Fails | Lc 39.4 | Non-text elements, placeholder text |
| #40CD81 text on black | 10.26:1 | AAA | Lc -62.9 | 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 400.
-
Step 50
50
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DBF0E1
oklch(93.6% 0.03 154.7)
-
Step 200
200
#BCE5C9
oklch(88.5% 0.057 155.2)
-
Step 300
300
#89D4A4
oklch(80.8% 0.101 155.3)
-
Step 400
400 (this color)
#40CD81
oklch(75.5% 0.163 155.2)
-
Step 500
500
#00A45E
oklch(63.1% 0.156 155.1)
-
Step 600
600
#008A4E
oklch(55.6% 0.137 155)
-
Step 700
700
#007441
oklch(49.1% 0.121 155.2)
-
Step 800
800
#005F34
oklch(42.6% 0.105 155.1)
-
Step 900
900
#004F2B
oklch(37.6% 0.092 155.5)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#40CD81 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) | #CCBD7C | 0.145 |
| Deuteranopia (no green cones) | #BBB086 | 0.143 |
| Tritanopia (no blue cones) | #00CBBA | 0.079 |
| Achromatopsia (no color) | #B5B5B5 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CD81
#40CD81
oklch(75.5% 0.163 155.2)
- #ED84D8
#ED84D8
oklch(75.4% 0.163 335)
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 #40CD81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.020
- Greenblue #23C48B ΔE 0.035
- Dark Mint #48C072 ΔE 0.036
- Algae Green #21C36F ΔE 0.037
- Soft Green #6FC276 ΔE 0.039
- Emerald #06D6A0 ΔE 0.039
- Dark Mint Green #20C073 ΔE 0.043
- Green Blue #01C08D ΔE 0.050
Use #40CD81 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.