#40D47C
Closest named color: Seaweed (#18D17B). oklch(77.2% 0.176 152.8), rgb(64, 212, 124).
Aa
Black text reads best on this color (10.92:1).
About this color
#40D47C is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.176 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.017 away. Black text reads best on it, at 10.92:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.92:1 |
| White text | 1.92:1 |
Values
| HEX | #40D47C |
| RGB | rgb(64, 212, 124) |
| HSL | hsl(144, 63%, 54%) |
| OKLCH | oklch(77.2% 0.176 152.8) |
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 #40D47C | 1.92:1 | Fails | Lc -40.6 | Non-text elements, placeholder text |
| Black text on #40D47C | 10.92:1 | AAA | Lc 67.6 | Content text, not long reading |
| #40D47C text on white | 1.92:1 | Fails | Lc 36.3 | Non-text elements, placeholder text |
| #40D47C text on black | 10.92:1 | AAA | Lc -66.2 | 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
#EAFAEE
oklch(97% 0.023 153.5)
-
Step 100
100
#D1F4DA
oklch(93.5% 0.05 153.2)
-
Step 200
200
#A7ECBA
oklch(88.4% 0.098 152.7)
-
Step 300
300 (this color)
#40D47C
oklch(77.2% 0.176 152.8)
-
Step 400
400
#00C066
oklch(70.8% 0.183 152.8)
-
Step 500
500
#00A456
oklch(63% 0.163 152.8)
-
Step 600
600
#008A48
oklch(55.5% 0.143 153)
-
Step 700
700
#00743B
oklch(49% 0.127 152.7)
-
Step 800
800
#005F30
oklch(42.6% 0.109 153.1)
-
Step 900
900
#005027
oklch(37.8% 0.098 152.9)
-
Step 950
950
#003015
oklch(27.1% 0.07 152.9)
#40D47C 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) | #D4C376 | 0.151 |
| Deuteranopia (no green cones) | #C2B682 | 0.149 |
| Tritanopia (no blue cones) | #00D1BE | 0.091 |
| Achromatopsia (no color) | #BBBBBB | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40D47C
#40D47C
oklch(77.2% 0.176 152.8)
- #F586E5
#F586E5
oklch(77.2% 0.176 332.7)
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 #40D47C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.017
- Aqua Green #12E193 ΔE 0.037
- Emerald #06D6A0 ΔE 0.044
- Weird Green #3AE57F ΔE 0.047
- Algae Green #21C36F ΔE 0.052
- Fresh Green #69D84F ΔE 0.052
- Soft Green #6FC276 ΔE 0.054
- Dark Mint #48C072 ΔE 0.055
Use #40D47C 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.