#40CC74
Closest named color: Seaweed (#18D17B). oklch(75% 0.173 151.7), rgb(64, 204, 116).
Aa
Black text reads best on this color (10.10:1).
About this color
#40CC74 is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.173 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.016 away. Black text reads best on it, at 10.10:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.10:1 |
| White text | 2.07:1 |
Values
| HEX | #40CC74 |
| RGB | rgb(64, 204, 116) |
| HSL | hsl(142, 58%, 53%) |
| OKLCH | oklch(75% 0.173 151.7) |
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 #40CC74 | 2.07:1 | Fails | Lc -44.7 | Non-text elements, placeholder text |
| Black text on #40CC74 | 10.10:1 | AAA | Lc 63.8 | Content text, not long reading |
| #40CC74 text on white | 2.07:1 | Fails | Lc 40.2 | Non-text elements, placeholder text |
| #40CC74 text on black | 10.10:1 | AAA | Lc -62.1 | 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 400.
-
Step 50
50
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DBF0E0
oklch(93.5% 0.031 152.9)
-
Step 200
200
#BDE5C6
oklch(88.5% 0.059 151.8)
-
Step 300
300
#8AD59E
oklch(80.9% 0.108 151.8)
-
Step 400
400 (this color)
#40CC74
oklch(75% 0.173 151.7)
-
Step 500
500
#00A552
oklch(63.2% 0.168 151.6)
-
Step 600
600
#008A44
oklch(55.5% 0.147 151.7)
-
Step 700
700
#007538
oklch(49.2% 0.131 151.5)
-
Step 800
800
#00602D
oklch(42.8% 0.114 151.6)
-
Step 900
900
#005025
oklch(37.8% 0.1 151.8)
-
Step 950
950
#003013
oklch(27.1% 0.072 151.4)
#40CC74 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) | #CDBB6E | 0.148 |
| Deuteranopia (no green cones) | #BBAF7A | 0.144 |
| Tritanopia (no blue cones) | #00C9B7 | 0.092 |
| Achromatopsia (no color) | #B4B4B4 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CC74
#40CC74
oklch(75% 0.173 151.7)
- #EB81DF
#EB81DF
oklch(75% 0.173 331.4)
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 #40CC74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.016
- Algae Green #21C36F ΔE 0.031
- Dark Mint #48C072 ΔE 0.034
- Dark Mint Green #20C073 ΔE 0.039
- Soft Green #6FC276 ΔE 0.042
- Greenblue #23C48B ΔE 0.044
- Emerald #06D6A0 ΔE 0.053
- Apple #6ECB3C ΔE 0.054
Use #40CC74 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.