#40AC63
Closest named color: Seaweed Green (#35AD6B). oklch(66.4% 0.146 151), rgb(64, 172, 99).
Aa
Black text reads best on this color (7.29:1).
About this color
#40AC63 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.146 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed Green (#35AD6B), ΔE 0.010 away. Black text reads best on it, at 7.29:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Seaweed Green (#35AD6B) |
| Black text | 7.29:1 |
| White text | 2.87:1 |
Values
| HEX | #40AC63 |
| RGB | rgb(64, 172, 99) |
| HSL | hsl(139, 46%, 46%) |
| OKLCH | oklch(66.4% 0.146 151) |
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 #40AC63 | 2.87:1 | Fails | Lc -60.0 | Large or bold text, headings |
| Black text on #40AC63 | 7.29:1 | AAA | Lc 49.4 | Large or bold text, headings |
| #40AC63 text on white | 2.87:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #40AC63 text on black | 7.29:1 | AAA | Lc -47.2 | 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 500.
-
Step 50
50
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E0EEE3
oklch(93.6% 0.021 152.2)
-
Step 200
200
#C7E1CC
oklch(88.5% 0.04 151.1)
-
Step 300
300
#9FCEA9
oklch(80.8% 0.072 151)
-
Step 400
400
#67B57B
oklch(70.7% 0.115 150.8)
-
Step 500
500 (this color)
#40AC63
oklch(66.4% 0.146 151)
-
Step 600
600
#008B42
oklch(55.7% 0.15 151)
-
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
#0A4F25
oklch(37.6% 0.095 150.8)
-
Step 950
950
#0B2E16
oklch(26.9% 0.06 150.6)
#40AC63 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) | #AD9E5E | 0.123 |
| Deuteranopia (no green cones) | #9F9468 | 0.122 |
| Tritanopia (no blue cones) | #1AA99A | 0.079 |
| Achromatopsia (no color) | #989898 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AC63
#40AC63
oklch(66.4% 0.146 151)
- #C56FBC
#C56FBC
oklch(66.4% 0.146 331)
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 #40AC63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed Green #35AD6B ΔE 0.010
- Jade Green #2BAF6A ΔE 0.012
- Algae #54AC68 ΔE 0.017
- Dark Pastel Green #56AE57 ΔE 0.022
- Medium Sea Green #3CB371 ΔE 0.022
- Dark Seafoam Green #3EAF76 ΔE 0.023
- Bluey Green #2BB179 ΔE 0.027
- Mid Green #50A747 ΔE 0.029
Use #40AC63 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.