#40BF09
Closest named color: Frog Green (#58BC08). oklch(70.6% 0.224 139.7), rgb(64, 191, 9).
Aa
Black text reads best on this color (8.67:1).
About this color
#40BF09 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.224 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Frog Green (#58BC08), ΔE 0.017 away. Black text reads best on it, at 8.67:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.224) |
| Temperature | in between |
| Nearest name | Frog Green (#58BC08) |
| Black text | 8.67:1 |
| White text | 2.42:1 |
Values
| HEX | #40BF09 |
| RGB | rgb(64, 191, 9) |
| HSL | hsl(102, 91%, 39%) |
| OKLCH | oklch(70.6% 0.224 139.7) |
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 #40BF09 | 2.42:1 | Fails | Lc -52.1 | Large or bold text, headings |
| Black text on #40BF09 | 8.67:1 | AAA | Lc 56.9 | Large or bold text, headings |
| #40BF09 text on white | 2.42:1 | Fails | Lc 47.1 | Large or bold text, headings |
| #40BF09 text on black | 8.67:1 | AAA | Lc -54.9 | 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
#EFF9ED
oklch(97.1% 0.019 140.5)
-
Step 100
100
#DCF1D7
oklch(93.6% 0.041 139.7)
-
Step 200
200
#BFE6B6
oklch(88.5% 0.077 139.8)
-
Step 300
300
#8FD67E
oklch(80.8% 0.139 139.7)
-
Step 400
400 (this color)
#40BF09
oklch(70.6% 0.224 139.7)
-
Step 500
500
#34A400
oklch(63% 0.202 139.7)
-
Step 600
600
#2A8A00
oklch(55.5% 0.178 139.8)
-
Step 700
700
#227400
oklch(49% 0.157 139.8)
-
Step 800
800
#1B5F00
oklch(42.6% 0.136 139.6)
-
Step 900
900
#155000
oklch(37.8% 0.121 139.7)
-
Step 950
950
#093000
oklch(27.1% 0.087 139.7)
#40BF09 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) | #C5AD00 | 0.151 |
| Deuteranopia (no green cones) | #B6A32B | 0.148 |
| Tritanopia (no blue cones) | #2BB8A2 | 0.152 |
| Achromatopsia (no color) | #A6A6A6 | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BF09
#40BF09
oklch(70.6% 0.224 139.7)
- #DA67F5
#DA67F5
oklch(70.6% 0.223 319.6)
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 #40BF09, closest first.
No curated palette has a color within ΔE 0.04 of #40BF09.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Frog Green #58BC08 ΔE 0.017
- Shamrock Green #02C14D ΔE 0.036
- Lime Green #32CD32 ΔE 0.038
- Leafy Green #51B73B ΔE 0.039
- Dark Lime Green #7EBD01 ΔE 0.052
- Shamrock #01B44C ΔE 0.057
- Apple #6ECB3C ΔE 0.058
- Dark Lime #84B701 ΔE 0.060
Use #40BF09 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.