#40AA63
Closest named color: Seaweed Green (#35AD6B). oklch(65.9% 0.143 151.2), rgb(64, 170, 99).
Aa
Black text reads best on this color (7.14:1).
About this color
#40AA63 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.143 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 0.011 away. Black text reads best on it, at 7.14:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Seaweed Green (#35AD6B) |
| Black text | 7.14:1 |
| White text | 2.93:1 |
Values
| HEX | #40AA63 |
| RGB | rgb(64, 170, 99) |
| HSL | hsl(140, 45%, 46%) |
| OKLCH | oklch(65.9% 0.143 151.2) |
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 #40AA63 | 2.93:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #40AA63 | 7.14:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #40AA63 text on white | 2.93:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #40AA63 text on black | 7.14:1 | AAA | Lc -46.3 | 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
#E1EEE3
oklch(93.6% 0.02 150.1)
-
Step 200
200
#C7E1CC
oklch(88.5% 0.04 151.1)
-
Step 300
300
#A0CEAA
oklch(80.9% 0.07 151.2)
-
Step 400
400
#68B47D
oklch(70.6% 0.111 151.6)
-
Step 500
500 (this color)
#40AA63
oklch(65.9% 0.143 151.2)
-
Step 600
600
#008B43
oklch(55.7% 0.149 151.3)
-
Step 700
700
#007537
oklch(49.2% 0.132 151.1)
-
Step 800
800
#00602C
oklch(42.8% 0.115 151.2)
-
Step 900
900
#0C4F26
oklch(37.7% 0.094 151.1)
-
Step 950
950
#0B2E17
oklch(26.9% 0.058 151.6)
#40AA63 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) | #AB9C5E | 0.122 |
| Deuteranopia (no green cones) | #9D9368 | 0.119 |
| Tritanopia (no blue cones) | #1BA798 | 0.077 |
| Achromatopsia (no color) | #979797 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AA63
#40AA63
oklch(65.9% 0.143 151.2)
- #C36EBA
#C36EBA
oklch(65.9% 0.144 331)
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 #40AA63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed Green #35AD6B ΔE 0.011
- Jade Green #2BAF6A ΔE 0.015
- Algae #54AC68 ΔE 0.019
- Dark Seafoam Green #3EAF76 ΔE 0.024
- Dark Pastel Green #56AE57 ΔE 0.026
- Medium Sea Green #3CB371 ΔE 0.027
- Bluey Green #2BB179 ΔE 0.028
- Jade #1FA774 ΔE 0.029
Use #40AA63 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.