#40B784
Closest named color: Dark Seafoam (#1FB57A). oklch(70% 0.131 161.4), rgb(64, 183, 132).
Aa
Black text reads best on this color (8.32:1).
About this color
#40B784 is a medium-light, moderately saturated green. In OKLCH its lightness is 70%, its chroma 0.131 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.022 away. Black text reads best on it, at 8.32:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.32:1 |
| White text | 2.52:1 |
Values
| HEX | #40B784 |
| RGB | rgb(64, 183, 132) |
| HSL | hsl(154, 48%, 48%) |
| OKLCH | oklch(70% 0.131 161.4) |
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 #40B784 | 2.52:1 | Fails | Lc -54.2 | Large or bold text, headings |
| Black text on #40B784 | 8.32:1 | AAA | Lc 54.9 | Large or bold text, headings |
| #40B784 text on white | 2.52:1 | Fails | Lc 49.1 | Large or bold text, headings |
| #40B784 text on black | 8.32:1 | AAA | Lc -52.8 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DDEFE5
oklch(93.6% 0.023 161.7)
-
Step 200
200
#C0E3D0
oklch(88.5% 0.045 161.6)
-
Step 300
300
#90D1B0
oklch(80.8% 0.081 161.8)
-
Step 400
400 (this color)
#40B784
oklch(70% 0.131 161.4)
-
Step 500
500
#00A36E
oklch(63.2% 0.14 161.4)
-
Step 600
600
#00895C
oklch(55.7% 0.123 161.5)
-
Step 700
700
#00734C
oklch(49.1% 0.109 161.2)
-
Step 800
800
#005E3E
oklch(42.6% 0.094 161.6)
-
Step 900
900
#004F33
oklch(37.8% 0.084 161.3)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#40B784 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) | #B4AA81 | 0.124 |
| Deuteranopia (no green cones) | #A59E87 | 0.122 |
| Tritanopia (no blue cones) | #00B7A9 | 0.053 |
| Achromatopsia (no color) | #A3A3A3 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B784
#40B784
oklch(70% 0.131 161.4)
- #D47CB6
#D47CB6
oklch(69.9% 0.13 341.1)
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 #40B784, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.022
- Bluey Green #2BB179 ΔE 0.025
- Medium Sea Green #3CB371 ΔE 0.026
- Dark Seafoam Green #3EAF76 ΔE 0.026
- Green Blue #01C08D ΔE 0.027
- Green Teal #0CB577 ΔE 0.028
- Greeny Blue #42B395 ΔE 0.030
- Greenblue #23C48B ΔE 0.036
Use #40B784 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.