#40C369
Closest named color: Algae Green (#21C36F). oklch(72.5% 0.171 150), rgb(64, 195, 105).
Aa
Black text reads best on this color (9.22:1).
About this color
#40C369 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.171 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.013 away. Black text reads best on it, at 9.22:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.22:1 |
| White text | 2.27:1 |
Values
| HEX | #40C369 |
| RGB | rgb(64, 195, 105) |
| HSL | hsl(139, 52%, 51%) |
| OKLCH | oklch(72.5% 0.171 150) |
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 #40C369 | 2.27:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #40C369 | 9.22:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #40C369 text on white | 2.27:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #40C369 text on black | 9.22:1 | AAA | Lc -57.7 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C5
oklch(88.5% 0.06 150.3)
-
Step 300
300
#8DD49C
oklch(80.8% 0.106 150.1)
-
Step 400
400 (this color)
#40C369
oklch(72.5% 0.171 150)
-
Step 500
500
#00A54B
oklch(63.1% 0.174 149.9)
-
Step 600
600
#008B3E
oklch(55.6% 0.154 149.9)
-
Step 700
700
#007533
oklch(49.1% 0.136 149.9)
-
Step 800
800
#006029
oklch(42.7% 0.118 150)
-
Step 900
900
#005021
oklch(37.7% 0.104 150)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#40C369 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) | #C4B362 | 0.141 |
| Deuteranopia (no green cones) | #B4A76F | 0.140 |
| Tritanopia (no blue cones) | #00C0AD | 0.093 |
| Achromatopsia (no color) | #ACACAC | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40C369
#40C369
oklch(72.5% 0.171 150)
- #E07AD9
#E07AD9
oklch(72.5% 0.172 329.7)
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 #40C369, closest first.
No curated palette has a color within ΔE 0.04 of #40C369.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.013
- Dark Mint #48C072 ΔE 0.017
- Dark Mint Green #20C073 ΔE 0.020
- Cool Green #33B864 ΔE 0.033
- Seaweed #18D17B ΔE 0.038
- Shamrock Green #02C14D ΔE 0.039
- Greenblue #23C48B ΔE 0.041
- Soft Green #6FC276 ΔE 0.042
Use #40C369 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.