#40B681
Closest named color: Dark Seafoam (#1FB57A). oklch(69.6% 0.132 160.3), rgb(64, 182, 129).
Aa
Black text reads best on this color (8.22:1).
About this color
#40B681 is a medium-light, moderately saturated green. In OKLCH its lightness is 70%, its chroma 0.132 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.019 away. Black text reads best on it, at 8.22:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.22:1 |
| White text | 2.55:1 |
Values
| HEX | #40B681 |
| RGB | rgb(64, 182, 129) |
| HSL | hsl(153, 48%, 48%) |
| OKLCH | oklch(69.6% 0.132 160.3) |
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 #40B681 | 2.55:1 | Fails | Lc -54.7 | Large or bold text, headings |
| Black text on #40B681 | 8.22:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #40B681 text on white | 2.55:1 | Fails | Lc 49.7 | Large or bold text, headings |
| #40B681 text on black | 8.22:1 | AAA | Lc -52.3 | 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
#DDEFE4
oklch(93.6% 0.024 159.1)
-
Step 200
200
#C0E3CF
oklch(88.5% 0.046 160.3)
-
Step 300
300
#91D2AF
oklch(81% 0.083 160.3)
-
Step 400
400 (this color)
#40B681
oklch(69.6% 0.132 160.3)
-
Step 500
500
#00A36B
oklch(63.1% 0.143 160.1)
-
Step 600
600
#00895A
oklch(55.6% 0.125 160.5)
-
Step 700
700
#00734B
oklch(49% 0.11 160.6)
-
Step 800
800
#005F3C
oklch(42.8% 0.097 159.8)
-
Step 900
900
#004F32
oklch(37.7% 0.085 160.4)
-
Step 950
950
#002F1C
oklch(26.9% 0.06 160.5)
#40B681 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) | #B4A97E | 0.125 |
| Deuteranopia (no green cones) | #A49D84 | 0.122 |
| Tritanopia (no blue cones) | #00B5A8 | 0.057 |
| Achromatopsia (no color) | #A2A2A2 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B681
#40B681
oklch(69.6% 0.132 160.3)
- #D37BB7
#D37BB7
oklch(69.7% 0.132 340)
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 #40B681, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.019
- Bluey Green #2BB179 ΔE 0.021
- Medium Sea Green #3CB371 ΔE 0.021
- Dark Seafoam Green #3EAF76 ΔE 0.022
- Green Teal #0CB577 ΔE 0.025
- Green Blue #01C08D ΔE 0.029
- Greeny Blue #42B395 ΔE 0.032
- Algae #54AC68 ΔE 0.035
Use #40B681 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.