#40AF99
Closest named color: Greeny Blue (#42B395). oklch(68.5% 0.105 177.4), rgb(64, 175, 153).
Aa
Black text reads best on this color (7.80:1).
About this color
#40AF99 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.105 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.015 away. Black text reads best on it, at 7.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.80:1 |
| White text | 2.68:1 |
Values
| HEX | #40AF99 |
| RGB | rgb(64, 175, 153) |
| HSL | hsl(168, 46%, 47%) |
| OKLCH | oklch(68.5% 0.105 177.4) |
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 #40AF99 | 2.68:1 | Fails | Lc -57.1 | Large or bold text, headings |
| Black text on #40AF99 | 7.80:1 | AAA | Lc 52.1 | Large or bold text, headings |
| #40AF99 text on white | 2.68:1 | Fails | Lc 51.9 | Large or bold text, headings |
| #40AF99 text on black | 7.80:1 | AAA | Lc -50.0 | 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
#C1E2D9
oklch(88.6% 0.037 177.1)
-
Step 300
300
#92CFC0
oklch(80.9% 0.066 177.5)
-
Step 400
400 (this color)
#40AF99
oklch(68.5% 0.105 177.4)
-
Step 500
500
#00A089
oklch(63.1% 0.116 177.6)
-
Step 600
600
#008673
oklch(55.5% 0.102 178.1)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#40AF99 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) | #A8A598 | 0.110 |
| Deuteranopia (no green cones) | #98999B | 0.105 |
| Tritanopia (no blue cones) | #00B1A8 | 0.025 |
| Achromatopsia (no color) | #9E9E9E | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AF99
#40AF99
oklch(68.5% 0.105 177.4)
- #CE7D9A
#CE7D9A
oklch(68.4% 0.106 357.3)
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 #40AF99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.015
- Light Sea Green #20B2AA ΔE 0.025
- Topaz #13BBAF ΔE 0.038
- Tea #65AB7C ΔE 0.043
- Dull Teal #5F9E8F ΔE 0.049
- Dark Seafoam Green #3EAF76 ΔE 0.050
- Bluey Green #2BB179 ΔE 0.051
- Persian Green #2A9D8F ΔE 0.056
Use #40AF99 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.