#40CD77
Closest named color: Seaweed (#18D17B). oklch(75.3% 0.172 152.4), rgb(64, 205, 119).
Aa
Black text reads best on this color (10.21:1).
About this color
#40CD77 is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.172 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.015 away. Black text reads best on it, at 10.21:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.21:1 |
| White text | 2.05:1 |
Values
| HEX | #40CD77 |
| RGB | rgb(64, 205, 119) |
| HSL | hsl(143, 59%, 53%) |
| OKLCH | oklch(75.3% 0.172 152.4) |
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 #40CD77 | 2.05:1 | Fails | Lc -44.2 | Non-text elements, placeholder text |
| Black text on #40CD77 | 10.21:1 | AAA | Lc 64.3 | Content text, not long reading |
| #40CD77 text on white | 2.05:1 | Fails | Lc 39.6 | Non-text elements, placeholder text |
| #40CD77 text on black | 10.21:1 | AAA | Lc -62.7 | 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 400.
-
Step 50
50
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DBF0E0
oklch(93.5% 0.031 152.9)
-
Step 200
200
#BDE5C6
oklch(88.5% 0.059 151.8)
-
Step 300
300
#8AD59F
oklch(81% 0.107 152.3)
-
Step 400
400 (this color)
#40CD77
oklch(75.3% 0.172 152.4)
-
Step 500
500
#00A455
oklch(63% 0.164 152.5)
-
Step 600
600
#008A46
oklch(55.5% 0.145 152.3)
-
Step 700
700
#00743A
oklch(49% 0.128 152.4)
-
Step 800
800
#00602F
oklch(42.8% 0.112 152.4)
-
Step 900
900
#005026
oklch(37.8% 0.099 152.3)
-
Step 950
950
#003014
oklch(27.1% 0.071 152.1)
#40CD77 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) | #CDBC71 | 0.147 |
| Deuteranopia (no green cones) | #BCB07D | 0.145 |
| Tritanopia (no blue cones) | #00CAB8 | 0.090 |
| Achromatopsia (no color) | #B5B5B5 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CD77
#40CD77
oklch(75.3% 0.172 152.4)
- #ED82DE
#ED82DE
oklch(75.4% 0.172 332.5)
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 #40CD77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.015
- Algae Green #21C36F ΔE 0.033
- Dark Mint #48C072 ΔE 0.036
- Dark Mint Green #20C073 ΔE 0.042
- Soft Green #6FC276 ΔE 0.042
- Greenblue #23C48B ΔE 0.043
- Emerald #06D6A0 ΔE 0.049
- Aqua Green #12E193 ΔE 0.055
Use #40CD77 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.