#40C365
Closest named color: Algae Green (#21C36F). oklch(72.4% 0.175 149.1), rgb(64, 195, 101).
Aa
Black text reads best on this color (9.21:1).
About this color
#40C365 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.175 and its hue 149°. 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 9.21:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.21:1 |
| White text | 2.27:1 |
Values
| HEX | #40C365 |
| RGB | rgb(64, 195, 101) |
| HSL | hsl(137, 52%, 51%) |
| OKLCH | oklch(72.4% 0.175 149.1) |
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 #40C365 | 2.27:1 | Fails | Lc -49.4 | Large or bold text, headings |
| Black text on #40C365 | 9.21:1 | AAA | Lc 59.4 | Large or bold text, headings |
| #40C365 text on white | 2.27:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #40C365 text on black | 9.21:1 | AAA | Lc -57.6 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C4
oklch(88.5% 0.061 149.4)
-
Step 300
300
#8DD59A
oklch(81% 0.11 149.1)
-
Step 400
400 (this color)
#40C365
oklch(72.4% 0.175 149.1)
-
Step 500
500
#00A547
oklch(63% 0.178 149.1)
-
Step 600
600
#008B3B
oklch(55.6% 0.156 149.2)
-
Step 700
700
#007530
oklch(49.1% 0.138 149)
-
Step 800
800
#006026
oklch(42.7% 0.12 149)
-
Step 900
900
#00501F
oklch(37.7% 0.106 149.2)
-
Step 950
950
#00300F
oklch(27% 0.076 148.8)
#40C365 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) | #C5B25D | 0.143 |
| Deuteranopia (no green cones) | #B4A76C | 0.140 |
| Tritanopia (no blue cones) | #00BFAD | 0.099 |
| Achromatopsia (no color) | #ACACAC | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C365
#40C365
oklch(72.4% 0.175 149.1)
- #E079DB
#E079DB
oklch(72.4% 0.175 329)
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 #40C365, closest first.
No curated palette has a color within ΔE 0.04 of #40C365.
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 0.021
- Dark Mint Green #20C073 ΔE 0.023
- Cool Green #33B864 ΔE 0.034
- Shamrock Green #02C14D ΔE 0.035
- Seaweed #18D17B ΔE 0.039
- Leafy Green #51B73B ΔE 0.043
- Soft Green #6FC276 ΔE 0.044
Use #40C365 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.