#40CFAE
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.1% 0.13 173.9), rgb(64, 207, 174).
Aa
Black text reads best on this color (10.75:1).
About this color
#40CFAE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.130 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.023 away. Black text reads best on it, at 10.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.75:1 |
| White text | 1.95:1 |
Values
| HEX | #40CFAE |
| RGB | rgb(64, 207, 174) |
| HSL | hsl(166, 60%, 53%) |
| OKLCH | oklch(77.1% 0.13 173.9) |
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 #40CFAE | 1.95:1 | Fails | Lc -41.5 | Non-text elements, placeholder text |
| Black text on #40CFAE | 10.75:1 | AAA | Lc 66.7 | Content text, not long reading |
| #40CFAE text on white | 1.95:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #40CFAE text on black | 10.75:1 | AAA | Lc -65.3 | Content text, not long reading |
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 300.
-
Step 50
50
#EAFAF4
oklch(97.2% 0.019 171.5)
-
Step 100
100
#D1F3E8
oklch(93.7% 0.038 173.9)
-
Step 200
200
#A7E9D5
oklch(88.4% 0.072 173.8)
-
Step 300
300 (this color)
#40CFAE
oklch(77.1% 0.13 173.9)
-
Step 400
400
#00BB9A
oklch(70.7% 0.134 174)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#40CFAE 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) | #C8C2AC | 0.134 |
| Deuteranopia (no green cones) | #B5B4B0 | 0.129 |
| Tritanopia (no blue cones) | #00D1C5 | 0.032 |
| Achromatopsia (no color) | #B9B9B9 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CFAE
#40CFAE
oklch(77.1% 0.13 173.9)
- #F490BA
#F490BA
oklch(77% 0.13 353.9)
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 #40CFAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.023
- Emerald #06D6A0 ΔE 0.036
- Medium Turquoise #48D1CC ΔE 0.043
- Seafoam Blue #78D1B6 ΔE 0.043
- Pale Teal #82CBB2 ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.051
- Greenblue #23C48B ΔE 0.055
- Turquoise #40E0D0 ΔE 0.057
Use #40CFAE 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.