#3FDAEC
Closest named color: Aqua Blue (#02D8E9). oklch(81.7% 0.126 206.6), rgb(63, 218, 236).
Aa
Black text reads best on this color (12.45:1).
About this color
#3FDAEC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.126 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.017 away. Black text reads best on it, at 12.45:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.45:1 |
| White text | 1.68:1 |
Values
| HEX | #3FDAEC |
| RGB | rgb(63, 218, 236) |
| HSL | hsl(186, 82%, 59%) |
| OKLCH | oklch(81.7% 0.126 206.6) |
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 #3FDAEC | 1.68:1 | Fails | Lc -33.3 | Non-text elements, placeholder text |
| Black text on #3FDAEC | 12.45:1 | AAA | Lc 74.3 | Content text, not long reading |
| #3FDAEC text on white | 1.68:1 | Fails | Lc 29.5 | Dividers and decoration only |
| #3FDAEC text on black | 12.45:1 | AAA | Lc -73.3 | 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
#E9F9FB
oklch(97.1% 0.017 205.8)
-
Step 100
100
#CFF1F6
oklch(93.5% 0.036 207.4)
-
Step 200
200
#A2E7F0
oklch(88.5% 0.07 206.2)
-
Step 300
300 (this color)
#3FDAEC
oklch(81.7% 0.126 206.6)
-
Step 400
400
#00B5C6
oklch(70.6% 0.121 206.7)
-
Step 500
500
#009BAA
oklch(63% 0.108 206.9)
-
Step 600
600
#00838F
oklch(55.7% 0.095 206.1)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#3FDAEC 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) | #C7D1ED | 0.122 |
| Deuteranopia (no green cones) | #AFC0EC | 0.112 |
| Tritanopia (no blue cones) | #00E4DF | 0.040 |
| Achromatopsia (no color) | #C7C7C7 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FDAEC
#3FDAEC
oklch(81.7% 0.126 206.6)
- #FFA9A0
#FFA9A0
oklch(81.7% 0.103 26.1)
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 #3FDAEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.017
- Medium Turquoise #48D1CC ΔE 0.045
- Turquoise #40E0D0 ΔE 0.048
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.051
- Sky Blue #87CEEB ΔE 0.056
- Bright Sky Blue #02CCFE ΔE 0.056
- Robin's Egg #6DEDFD ΔE 0.063
Use #3FDAEC 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.