#40A799
Closest named color: Dull Teal (#5F9E8F). oklch(66.5% 0.097 182.8), rgb(64, 167, 153).
Aa
Black text reads best on this color (7.20:1).
About this color
#40A799 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Teal (#5F9E8F), ΔE 0.031 away. Black text reads best on it, at 7.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dull Teal (#5F9E8F) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #40A799 |
| RGB | rgb(64, 167, 153) |
| HSL | hsl(172, 45%, 45%) |
| OKLCH | oklch(66.5% 0.097 182.8) |
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 #40A799 | 2.91:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #40A799 | 7.20:1 | AAA | Lc 48.8 | Large or bold text, headings |
| #40A799 text on white | 2.91:1 | Fails | Lc 55.2 | Large or bold text, headings |
| #40A799 text on black | 7.20:1 | AAA | Lc -46.6 | 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 500.
-
Step 50
50
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C7DFDB
oklch(88.5% 0.026 184.7)
-
Step 300
300
#9FCBC3
oklch(80.8% 0.048 182.7)
-
Step 400
400
#67B0A5
oklch(70.6% 0.075 183.4)
-
Step 500
500 (this color)
#40A799
oklch(66.5% 0.097 182.8)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#0A4C45
oklch(37.6% 0.063 183.9)
-
Step 950
950
#0A2D28
oklch(27.1% 0.041 182)
#40A799 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) | #A09E99 | 0.104 |
| Deuteranopia (no green cones) | #90929A | 0.098 |
| Tritanopia (no blue cones) | #00AAA3 | 0.022 |
| Achromatopsia (no color) | #979797 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A799
#40A799
oklch(66.5% 0.097 182.8)
- #C57A8E
#C57A8E
oklch(66.5% 0.096 2.8)
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 #40A799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Teal #5F9E8F ΔE 0.031
- Light Sea Green #20B2AA ΔE 0.033
- Persian Green #2A9D8F ΔE 0.035
- Grey Teal #5E9B8A ΔE 0.038
- Greeny Blue #42B395 ΔE 0.038
- Cadet Blue #5F9EA0 ΔE 0.039
- Sea #3C9992 ΔE 0.041
- Blue Green #0F9B8E ΔE 0.045
Use #40A799 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.