#40C56D
Closest named color: Algae Green (#21C36F). oklch(73.1% 0.17 150.8), rgb(64, 197, 109).
Aa
Black text reads best on this color (9.42:1).
About this color
#40C56D is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.170 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.015 away. Black text reads best on it, at 9.42:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.42:1 |
| White text | 2.22:1 |
Values
| HEX | #40C56D |
| RGB | rgb(64, 197, 109) |
| HSL | hsl(140, 53%, 51%) |
| OKLCH | oklch(73.1% 0.17 150.8) |
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 #40C56D | 2.22:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #40C56D | 9.42:1 | AAA | Lc 60.5 | Content text, not long reading |
| #40C56D text on white | 2.22:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #40C56D text on black | 9.42:1 | AAA | Lc -58.7 | 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
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DCF0E0
oklch(93.6% 0.03 151.5)
-
Step 200
200
#BEE5C5
oklch(88.5% 0.06 150.3)
-
Step 300
300
#8CD49D
oklch(80.8% 0.106 150.9)
-
Step 400
400 (this color)
#40C56D
oklch(73.1% 0.17 150.8)
-
Step 500
500
#00A54F
oklch(63.2% 0.171 150.8)
-
Step 600
600
#008B41
oklch(55.7% 0.151 150.7)
-
Step 700
700
#007536
oklch(49.2% 0.133 150.8)
-
Step 800
800
#00602B
oklch(42.8% 0.116 150.8)
-
Step 900
900
#005023
oklch(37.7% 0.102 150.9)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#40C56D 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) | #C6B566 | 0.142 |
| Deuteranopia (no green cones) | #B5A973 | 0.140 |
| Tritanopia (no blue cones) | #00C2B0 | 0.092 |
| Achromatopsia (no color) | #AEAEAE | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C56D
#40C56D
oklch(73.1% 0.17 150.8)
- #E37CD9
#E37CD9
oklch(73.1% 0.17 330.8)
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 #40C56D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.015
- Dark Mint #48C072 ΔE 0.018
- Dark Mint Green #20C073 ΔE 0.023
- Seaweed #18D17B ΔE 0.033
- Greenblue #23C48B ΔE 0.039
- Cool Green #33B864 ΔE 0.039
- Soft Green #6FC276 ΔE 0.039
- Shamrock Green #02C14D ΔE 0.043
Use #40C56D 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.