#40B279
Closest named color: Dark Seafoam Green (#3EAF76). oklch(68.4% 0.134 157.8), rgb(64, 178, 121).
Aa
Black text reads best on this color (7.86:1).
About this color
#40B279 is a medium-light, moderately saturated green. In OKLCH its lightness is 68%, its chroma 0.134 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam Green (#3EAF76), ΔE 0.009 away. Black text reads best on it, at 7.86:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Dark Seafoam Green (#3EAF76) |
| Black text | 7.86:1 |
| White text | 2.67:1 |
Values
| HEX | #40B279 |
| RGB | rgb(64, 178, 121) |
| HSL | hsl(150, 47%, 47%) |
| OKLCH | oklch(68.4% 0.134 157.8) |
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 #40B279 | 2.67:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #40B279 | 7.86:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #40B279 text on white | 2.67:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #40B279 text on black | 7.86:1 | AAA | Lc -50.3 | 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
#F0F8F3
oklch(97.2% 0.011 158.8)
-
Step 100
100
#DDEFE4
oklch(93.6% 0.024 159.1)
-
Step 200
200
#C1E3CE
oklch(88.5% 0.046 158.2)
-
Step 300
300
#92D1AC
oklch(80.8% 0.083 158.1)
-
Step 400
400 (this color)
#40B279
oklch(68.4% 0.134 157.8)
-
Step 500
500
#00A365
oklch(63% 0.148 157.8)
-
Step 600
600
#008955
oklch(55.5% 0.129 158.2)
-
Step 700
700
#007446
oklch(49.2% 0.116 157.5)
-
Step 800
800
#005F39
oklch(42.8% 0.1 157.9)
-
Step 900
900
#004F2F
oklch(37.7% 0.088 158.2)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#40B279 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) | #B1A576 | 0.124 |
| Deuteranopia (no green cones) | #A19A7D | 0.120 |
| Tritanopia (no blue cones) | #00B1A3 | 0.061 |
| Achromatopsia (no color) | #9E9E9E | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B279
#40B279
oklch(68.4% 0.134 157.8)
- #CE77B6
#CE77B6
oklch(68.4% 0.134 338.1)
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 #40B279, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam Green #3EAF76 ΔE 0.009
- Bluey Green #2BB179 ΔE 0.012
- Medium Sea Green #3CB371 ΔE 0.013
- Dark Seafoam #1FB57A ΔE 0.015
- Green Teal #0CB577 ΔE 0.020
- Seaweed Green #35AD6B ΔE 0.023
- Algae #54AC68 ΔE 0.023
- Jade Green #2BAF6A ΔE 0.025
Use #40B279 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.