#40B757
Closest named color: Cool Green (#33B864). oklch(69.1% 0.172 146.9), rgb(64, 183, 87).
Aa
Black text reads best on this color (8.12:1).
About this color
#40B757 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.172 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.014 away. Black text reads best on it, at 8.12:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.12:1 |
| White text | 2.58:1 |
Values
| HEX | #40B757 |
| RGB | rgb(64, 183, 87) |
| HSL | hsl(132, 48%, 48%) |
| OKLCH | oklch(69.1% 0.172 146.9) |
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 #40B757 | 2.58:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #40B757 | 8.12:1 | AAA | Lc 53.9 | Large or bold text, headings |
| #40B757 text on white | 2.58:1 | Fails | Lc 50.1 | Large or bold text, headings |
| #40B757 text on black | 8.12:1 | AAA | Lc -51.8 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DDF0DE
oklch(93.6% 0.031 146.8)
-
Step 200
200
#C0E4C3
oklch(88.4% 0.059 147.3)
-
Step 300
300
#91D498
oklch(80.9% 0.108 147.1)
-
Step 400
400 (this color)
#40B757
oklch(69.1% 0.172 146.9)
-
Step 500
500
#00A63B
oklch(63.2% 0.188 146.9)
-
Step 600
600
#008B30
oklch(55.5% 0.165 146.9)
-
Step 700
700
#007527
oklch(49% 0.146 146.9)
-
Step 800
800
#00601F
oklch(42.6% 0.127 147)
-
Step 900
900
#005018
oklch(37.6% 0.112 146.9)
-
Step 950
950
#00300B
oklch(26.9% 0.08 146.8)
#40B757 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) | #B9A74F | 0.134 |
| Deuteranopia (no green cones) | #AB9D5E | 0.134 |
| Tritanopia (no blue cones) | #1BB3A1 | 0.101 |
| Achromatopsia (no color) | #A1A1A1 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B757
#40B757
oklch(69.1% 0.172 146.9)
- #D271D2
#D271D2
oklch(69.2% 0.171 327.2)
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 #40B757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.014
- Leafy Green #51B73B ΔE 0.026
- Shamrock #01B44C ΔE 0.027
- Dark Pastel Green #56AE57 ΔE 0.028
- Medium Green #39AD48 ΔE 0.031
- Dark Mint Green #20C073 ΔE 0.033
- Algae Green #21C36F ΔE 0.036
- Medium Sea Green #3CB371 ΔE 0.036
Use #40B757 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.