#40BB5F
Closest named color: Cool Green (#33B864). oklch(70.3% 0.17 148.4), rgb(64, 187, 95).
Aa
Black text reads best on this color (8.49:1).
About this color
#40BB5F is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.170 and its hue 148°. 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 8.49:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.49:1 |
| White text | 2.47:1 |
Values
| HEX | #40BB5F |
| RGB | rgb(64, 187, 95) |
| HSL | hsl(135, 49%, 49%) |
| OKLCH | oklch(70.3% 0.17 148.4) |
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 #40BB5F | 2.47:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #40BB5F | 8.49:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #40BB5F text on white | 2.47:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #40BB5F text on black | 8.49:1 | AAA | Lc -53.8 | 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
#DDF0DF
oklch(93.6% 0.03 148.4)
-
Step 200
200
#BFE5C4
oklch(88.6% 0.06 148.8)
-
Step 300
300
#90D49A
oklch(80.9% 0.106 148.3)
-
Step 400
400 (this color)
#40BB5F
oklch(70.3% 0.17 148.4)
-
Step 500
500
#00A544
oklch(63% 0.18 148.5)
-
Step 600
600
#008B38
oklch(55.6% 0.159 148.5)
-
Step 700
700
#00752E
oklch(49.1% 0.14 148.5)
-
Step 800
800
#006024
oklch(42.7% 0.122 148.4)
-
Step 900
900
#00501D
oklch(37.6% 0.108 148.5)
-
Step 950
950
#00300E
oklch(27% 0.077 148.3)
#40BB5F 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) | #BDAB57 | 0.137 |
| Deuteranopia (no green cones) | #ADA166 | 0.134 |
| Tritanopia (no blue cones) | #11B7A5 | 0.097 |
| Achromatopsia (no color) | #A5A5A5 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BB5F
#40BB5F
oklch(70.3% 0.17 148.4)
- #D774D3
#D774D3
oklch(70.3% 0.17 328.7)
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 #40BB5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.014
- Dark Mint Green #20C073 ΔE 0.023
- Algae Green #21C36F ΔE 0.024
- Dark Mint #48C072 ΔE 0.025
- Leafy Green #51B73B ΔE 0.032
- Shamrock Green #02C14D ΔE 0.035
- Boring Green #63B365 ΔE 0.036
- Dark Pastel Green #56AE57 ΔE 0.036
Use #40BB5F 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.