#40E2E0
Closest named color: Turquoise (#40E0D0). oklch(83.2% 0.129 193.7), rgb(64, 226, 224).
Aa
Black text reads best on this color (13.17:1).
About this color
#40E2E0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.129 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.022 away. Black text reads best on it, at 13.17:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.17:1 |
| White text | 1.59:1 |
Values
| HEX | #40E2E0 |
| RGB | rgb(64, 226, 224) |
| HSL | hsl(179, 74%, 57%) |
| OKLCH | oklch(83.2% 0.129 193.7) |
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 #40E2E0 | 1.59:1 | Fails | Lc -29.9 | Dividers and decoration only |
| Black text on #40E2E0 | 13.17:1 | AAA | Lc 77.3 | Fine for body text |
| #40E2E0 text on white | 1.59:1 | Fails | Lc 26.4 | Dividers and decoration only |
| #40E2E0 text on black | 13.17:1 | AAA | Lc -76.6 | Fine for body text |
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
#E9F9F9
oklch(97% 0.017 196.9)
-
Step 100
100
#CEF2F1
oklch(93.5% 0.037 194.5)
-
Step 200
200
#A1E9E7
oklch(88.6% 0.072 193.7)
-
Step 300
300 (this color)
#40E2E0
oklch(83.2% 0.129 193.7)
-
Step 400
400
#00B8B6
oklch(70.8% 0.121 193.4)
-
Step 500
500
#009D9C
oklch(63% 0.108 194)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#40E2E0 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) | #D4D7E0 | 0.135 |
| Deuteranopia (no green cones) | #BCC5E1 | 0.127 |
| Tritanopia (no blue cones) | #00E9E1 | 0.021 |
| Achromatopsia (no color) | #CDCDCD | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40E2E0
#40E2E0
oklch(83.2% 0.129 193.7)
- #FFAFB6
#FFAFB6
oklch(83.2% 0.094 13.5)
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 #40E2E0, closest first.
No curated palette has a color within ΔE 0.04 of #40E2E0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.022
- Aqua Blue #02D8E9 ΔE 0.039
- Medium Turquoise #48D1CC ΔE 0.047
- Robin's Egg #6DEDFD ΔE 0.056
- Bright Light Blue #26F7FD ΔE 0.059
- Bright Aqua #0BF9EA ΔE 0.060
- Dark Turquoise #00CED1 ΔE 0.061
- Aqua Marine #2EE8BB ΔE 0.061
Use #40E2E0 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.