#40B665
Closest named color: Cool Green (#33B864). oklch(69.1% 0.158 150.3), rgb(64, 182, 101).
Aa
Black text reads best on this color (8.09:1).
About this color
#40B665 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.158 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.009 away. Black text reads best on it, at 8.09:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.09:1 |
| White text | 2.59:1 |
Values
| HEX | #40B665 |
| RGB | rgb(64, 182, 101) |
| HSL | hsl(139, 48%, 48%) |
| OKLCH | oklch(69.1% 0.158 150.3) |
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 #40B665 | 2.59:1 | Fails | Lc -55.4 | Large or bold text, headings |
| Black text on #40B665 | 8.09:1 | AAA | Lc 53.7 | Large or bold text, headings |
| #40B665 text on white | 2.59:1 | Fails | Lc 50.3 | Large or bold text, headings |
| #40B665 text on black | 8.09:1 | AAA | Lc -51.6 | 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 400.
-
Step 50
50
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DDF0E0
oklch(93.7% 0.029 150.1)
-
Step 200
200
#C0E4C7
oklch(88.5% 0.055 150.9)
-
Step 300
300
#91D39F
oklch(80.9% 0.099 150.3)
-
Step 400
400 (this color)
#40B665
oklch(69.1% 0.158 150.3)
-
Step 500
500
#00A54D
oklch(63.1% 0.172 150.4)
-
Step 600
600
#008B40
oklch(55.7% 0.152 150.4)
-
Step 700
700
#007534
oklch(49.2% 0.135 150.2)
-
Step 800
800
#00602A
oklch(42.8% 0.117 150.4)
-
Step 900
900
#005022
oklch(37.7% 0.103 150.5)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#40B665 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) | #B7A75F | 0.131 |
| Deuteranopia (no green cones) | #A89D6A | 0.128 |
| Tritanopia (no blue cones) | #10B3A2 | 0.086 |
| Achromatopsia (no color) | #A1A1A1 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B665
#40B665
oklch(69.1% 0.158 150.3)
- #D174C9
#D174C9
oklch(69.1% 0.157 330.3)
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 #40B665, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.009
- Medium Sea Green #3CB371 ΔE 0.020
- Dark Pastel Green #56AE57 ΔE 0.024
- Jade Green #2BAF6A ΔE 0.027
- Boring Green #63B365 ΔE 0.027
- Green Teal #0CB577 ΔE 0.027
- Dark Mint Green #20C073 ΔE 0.028
- Dark Seafoam #1FB57A ΔE 0.029
Use #40B665 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.