#40B09D
Closest named color: Greeny Blue (#42B395). oklch(68.9% 0.105 179.7), rgb(64, 176, 157).
Aa
Black text reads best on this color (7.91:1).
About this color
#40B09D is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.105 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.017 away. Black text reads best on it, at 7.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.91:1 |
| White text | 2.65:1 |
Values
| HEX | #40B09D |
| RGB | rgb(64, 176, 157) |
| HSL | hsl(170, 47%, 47%) |
| OKLCH | oklch(68.9% 0.105 179.7) |
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 #40B09D | 2.65:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #40B09D | 7.91:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #40B09D text on white | 2.65:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #40B09D text on black | 7.91:1 | AAA | Lc -50.6 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DDEEEA
oklch(93.5% 0.019 180.3)
-
Step 200
200
#C0E1DA
oklch(88.4% 0.036 181.2)
-
Step 300
300
#92CFC2
oklch(80.9% 0.065 179.8)
-
Step 400
400 (this color)
#40B09D
oklch(68.9% 0.105 179.7)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008675
oklch(55.5% 0.101 179.7)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#40B09D 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) | #A9A69C | 0.111 |
| Deuteranopia (no green cones) | #989A9F | 0.105 |
| Tritanopia (no blue cones) | #00B3AA | 0.023 |
| Achromatopsia (no color) | #9F9F9F | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B09D
#40B09D
oklch(68.9% 0.105 179.7)
- #D07F99
#D07F99
oklch(68.9% 0.105 359.5)
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 #40B09D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.017
- Light Sea Green #20B2AA ΔE 0.020
- Topaz #13BBAF ΔE 0.034
- Tea #65AB7C ΔE 0.047
- Dull Teal #5F9E8F ΔE 0.051
- Dark Seafoam Green #3EAF76 ΔE 0.055
- Bluey Green #2BB179 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.057
Use #40B09D 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.