#40B259
Closest named color: Dark Pastel Green (#56AE57). oklch(67.8% 0.164 147.7), rgb(64, 178, 89).
Aa
Black text reads best on this color (7.73:1).
About this color
#40B259 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.164 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.017 away. Black text reads best on it, at 7.73:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.73:1 |
| White text | 2.71:1 |
Values
| HEX | #40B259 |
| RGB | rgb(64, 178, 89) |
| HSL | hsl(133, 47%, 47%) |
| OKLCH | oklch(67.8% 0.164 147.7) |
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 #40B259 | 2.71:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #40B259 | 7.73:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #40B259 text on white | 2.71:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #40B259 text on black | 7.73:1 | AAA | Lc -49.6 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DDF0DF
oklch(93.6% 0.03 148.4)
-
Step 200
200
#C1E4C4
oklch(88.5% 0.057 147.4)
-
Step 300
300
#93D39B
oklch(80.9% 0.102 147.7)
-
Step 400
400 (this color)
#40B259
oklch(67.8% 0.164 147.7)
-
Step 500
500
#00A640
oklch(63.2% 0.184 147.7)
-
Step 600
600
#008B34
oklch(55.5% 0.162 147.6)
-
Step 700
700
#00752B
oklch(49% 0.143 147.8)
-
Step 800
800
#006022
oklch(42.6% 0.124 147.8)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#00300D
oklch(27% 0.078 147.8)
#40B259 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) | #B4A352 | 0.130 |
| Deuteranopia (no green cones) | #A6995F | 0.129 |
| Tritanopia (no blue cones) | #1DAE9D | 0.095 |
| Achromatopsia (no color) | #9D9D9D | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B259
#40B259
oklch(67.8% 0.164 147.7)
- #CC6FCB
#CC6FCB
oklch(67.9% 0.164 327.6)
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 #40B259, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.017
- Cool Green #33B864 ΔE 0.018
- Medium Green #39AD48 ΔE 0.022
- Jade Green #2BAF6A ΔE 0.026
- Medium Sea Green #3CB371 ΔE 0.028
- Shamrock #01B44C ΔE 0.028
- Seaweed Green #35AD6B ΔE 0.030
- Mid Green #50A747 ΔE 0.031
Use #40B259 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.