#3FD5EF
Closest named color: Aqua Blue (#02D8E9). oklch(80.7% 0.126 212), rgb(63, 213, 239).
Aa
Black text reads best on this color (11.97:1).
About this color
#3FD5EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.126 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.020 away. Black text reads best on it, at 11.97:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.97:1 |
| White text | 1.75:1 |
Values
| HEX | #3FD5EF |
| RGB | rgb(63, 213, 239) |
| HSL | hsl(189, 85%, 59%) |
| OKLCH | oklch(80.7% 0.126 212) |
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 #3FD5EF | 1.75:1 | Fails | Lc -35.5 | Non-text elements, placeholder text |
| Black text on #3FD5EF | 11.97:1 | AAA | Lc 72.2 | Content text, not long reading |
| #3FD5EF text on white | 1.75:1 | Fails | Lc 31.6 | Non-text elements, placeholder text |
| #3FD5EF text on black | 11.97:1 | AAA | Lc -71.1 | 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
#E9F9FC
oklch(97.1% 0.017 210.2)
-
Step 100
100
#CFF1F8
oklch(93.6% 0.037 211.5)
-
Step 200
200
#A3E6F4
oklch(88.5% 0.07 212.1)
-
Step 300
300 (this color)
#3FD5EF
oklch(80.7% 0.126 212)
-
Step 400
400
#00B4CD
oklch(70.7% 0.123 212.1)
-
Step 500
500
#009AB0
oklch(63% 0.11 212.4)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#3FD5EF 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) | #C1CEF1 | 0.117 |
| Deuteranopia (no green cones) | #A8BCEF | 0.105 |
| Tritanopia (no blue cones) | #00E0DD | 0.048 |
| Achromatopsia (no color) | #C3C3C3 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FD5EF
#3FD5EF
oklch(80.7% 0.126 212)
- #FFA593
#FFA593
oklch(80.7% 0.111 31.9)
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 #3FD5EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.020
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Bright Sky Blue #02CCFE ΔE 0.041
- Medium Turquoise #48D1CC ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.049
- Sky Blue #87CEEB ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.054
- Light Sky Blue #87CEFA ΔE 0.058
Use #3FD5EF 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.