#40D78C
Closest named color: Aqua Green (#12E193). oklch(78.3% 0.166 156.9), rgb(64, 215, 140).
Aa
Black text reads best on this color (11.31:1).
About this color
#40D78C is a light, vivid green. In OKLCH its lightness is 78%, its chroma 0.166 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Green (#12E193), ΔE 0.027 away. Black text reads best on it, at 11.31:1.
| Hue family | Greens |
| Lightness | light (78%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Aqua Green (#12E193) |
| Black text | 11.31:1 |
| White text | 1.85:1 |
Values
| HEX | #40D78C |
| RGB | rgb(64, 215, 140) |
| HSL | hsl(150, 65%, 55%) |
| OKLCH | oklch(78.3% 0.166 156.9) |
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 #40D78C | 1.85:1 | Fails | Lc -38.7 | Non-text elements, placeholder text |
| Black text on #40D78C | 11.31:1 | AAA | Lc 69.3 | Content text, not long reading |
| #40D78C text on white | 1.85:1 | Fails | Lc 34.5 | Non-text elements, placeholder text |
| #40D78C text on black | 11.31:1 | AAA | Lc -68.0 | Content text, not long reading |
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 300.
-
Step 50
50
#EAFAF0
oklch(97.1% 0.021 158.6)
-
Step 100
100
#D1F4DD
oklch(93.6% 0.048 156.6)
-
Step 200
200
#A6ECC1
oklch(88.5% 0.092 157)
-
Step 300
300 (this color)
#40D78C
oklch(78.3% 0.166 156.9)
-
Step 400
400
#00BF74
oklch(70.8% 0.169 156.8)
-
Step 500
500
#00A463
oklch(63.2% 0.151 156.8)
-
Step 600
600
#008A52
oklch(55.7% 0.134 156.6)
-
Step 700
700
#007444
oklch(49.2% 0.118 156.6)
-
Step 800
800
#005F37
oklch(42.7% 0.102 156.7)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#40D78C 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) | #D6C687 | 0.152 |
| Deuteranopia (no green cones) | #C3B991 | 0.147 |
| Tritanopia (no blue cones) | #00D5C4 | 0.078 |
| Achromatopsia (no color) | #BEBEBE | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D78C
#40D78C
oklch(78.3% 0.166 156.9)
- #FA8BDF
#FA8BDF
oklch(78.3% 0.167 336.9)
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 #40D78C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Green #12E193 ΔE 0.027
- Emerald #06D6A0 ΔE 0.029
- Seaweed #18D17B ΔE 0.031
- Weird Green #3AE57F ΔE 0.047
- Greenblue #23C48B ΔE 0.058
- Soft Green #6FC276 ΔE 0.058
- Medium Aquamarine #66CDAA ΔE 0.063
- Dark Mint #48C072 ΔE 0.064
Use #40D78C 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.