#40B169
Closest named color: Medium Sea Green (#3CB371). oklch(67.8% 0.147 152.2), rgb(64, 177, 105).
Aa
Black text reads best on this color (7.71:1).
About this color
#40B169 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.147 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Sea Green (#3CB371), ΔE 0.010 away. Black text reads best on it, at 7.71:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Medium Sea Green (#3CB371) |
| Black text | 7.71:1 |
| White text | 2.72:1 |
Values
| HEX | #40B169 |
| RGB | rgb(64, 177, 105) |
| HSL | hsl(142, 47%, 47%) |
| OKLCH | oklch(67.8% 0.147 152.2) |
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 #40B169 | 2.72:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #40B169 | 7.71:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #40B169 text on white | 2.72:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #40B169 text on black | 7.71:1 | AAA | Lc -49.5 | 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
#DDEFE1
oklch(93.5% 0.027 152.4)
-
Step 200
200
#C1E3C9
oklch(88.4% 0.05 152.3)
-
Step 300
300
#93D2A4
oklch(80.9% 0.091 152.4)
-
Step 400
400 (this color)
#40B169
oklch(67.8% 0.147 152.2)
-
Step 500
500
#00A554
oklch(63.2% 0.166 152.1)
-
Step 600
600
#008A46
oklch(55.5% 0.145 152.3)
-
Step 700
700
#00743A
oklch(49% 0.128 152.4)
-
Step 800
800
#00602E
oklch(42.8% 0.113 152)
-
Step 900
900
#005025
oklch(37.8% 0.1 151.8)
-
Step 950
950
#003014
oklch(27.1% 0.071 152.1)
#40B169 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) | #B1A364 | 0.125 |
| Deuteranopia (no green cones) | #A3996E | 0.124 |
| Tritanopia (no blue cones) | #10AF9F | 0.077 |
| Achromatopsia (no color) | #9D9D9D | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B169
#40B169
oklch(67.8% 0.147 152.2)
- #CB73C0
#CB73C0
oklch(67.9% 0.147 331.8)
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 #40B169, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Sea Green #3CB371 ΔE 0.010
- Jade Green #2BAF6A ΔE 0.013
- Seaweed Green #35AD6B ΔE 0.015
- Algae #54AC68 ΔE 0.018
- Dark Seafoam Green #3EAF76 ΔE 0.020
- Green Teal #0CB577 ΔE 0.021
- Bluey Green #2BB179 ΔE 0.021
- Dark Pastel Green #56AE57 ΔE 0.022
Use #40B169 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.