#40B99E
Closest named color: Greeny Blue (#42B395). oklch(71.2% 0.114 175.1), rgb(64, 185, 158).
Aa
Black text reads best on this color (8.65:1).
About this color
#40B99E is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.114 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.018 away. Black text reads best on it, at 8.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.65:1 |
| White text | 2.42:1 |
Values
| HEX | #40B99E |
| RGB | rgb(64, 185, 158) |
| HSL | hsl(167, 49%, 49%) |
| OKLCH | oklch(71.2% 0.114 175.1) |
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 #40B99E | 2.42:1 | Fails | Lc -52.4 | Large or bold text, headings |
| Black text on #40B99E | 8.65:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #40B99E text on white | 2.42:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #40B99E text on black | 8.65:1 | AAA | Lc -54.6 | 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
#EFF8F5
oklch(97.2% 0.01 174.3)
-
Step 100
100
#DDEFE9
oklch(93.7% 0.021 173.9)
-
Step 200
200
#BFE2D8
oklch(88.5% 0.039 176.2)
-
Step 300
300
#8FD0BE
oklch(80.9% 0.071 175.2)
-
Step 400
400 (this color)
#40B99E
oklch(71.2% 0.114 175.1)
-
Step 500
500
#00A085
oklch(63% 0.119 175)
-
Step 600
600
#008770
oklch(55.7% 0.105 175.1)
-
Step 700
700
#00715E
oklch(49% 0.092 175.6)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#40B99E 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) | #B3AE9D | 0.120 |
| Deuteranopia (no green cones) | #A1A1A0 | 0.114 |
| Tritanopia (no blue cones) | #00BBB1 | 0.029 |
| Achromatopsia (no color) | #A6A6A6 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B99E
#40B99E
oklch(71.2% 0.114 175.1)
- #DA83A5
#DA83A5
oklch(71.2% 0.114 355.4)
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 #40B99E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.018
- Topaz #13BBAF ΔE 0.025
- Light Sea Green #20B2AA ΔE 0.034
- Green Blue #01C08D ΔE 0.041
- Greenblue #23C48B ΔE 0.050
- Tea #65AB7C ΔE 0.052
- Dark Seafoam #1FB57A ΔE 0.054
- Bluey Green #2BB179 ΔE 0.055
Use #40B99E 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.