#3FC5DA
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76.1% 0.116 210.2), rgb(63, 197, 218).
Aa
Black text reads best on this color (10.21:1).
About this color
#3FC5DA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.116 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.034 away. Black text reads best on it, at 10.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.21:1 |
| White text | 2.05:1 |
Values
| HEX | #3FC5DA |
| RGB | rgb(63, 197, 218) |
| HSL | hsl(188, 68%, 55%) |
| OKLCH | oklch(76.1% 0.116 210.2) |
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 #3FC5DA | 2.05:1 | Fails | Lc -44.3 | Non-text elements, placeholder text |
| Black text on #3FC5DA | 10.21:1 | AAA | Lc 64.2 | Content text, not long reading |
| #3FC5DA text on white | 2.05:1 | Fails | Lc 39.7 | Non-text elements, placeholder text |
| #3FC5DA text on black | 10.21:1 | AAA | Lc -62.6 | 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
#EAF9FB
oklch(97.2% 0.016 206.4)
-
Step 100
100
#D1F1F6
oklch(93.7% 0.034 208)
-
Step 200
200
#A7E5F1
oklch(88.4% 0.065 210.9)
-
Step 300
300 (this color)
#3FC5DA
oklch(76.1% 0.116 210.2)
-
Step 400
400
#00B5CB
oklch(70.8% 0.123 210)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#3FC5DA 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) | #B3BEDB | 0.109 |
| Deuteranopia (no green cones) | #9DAEDA | 0.099 |
| Tritanopia (no blue cones) | #00CECB | 0.041 |
| Achromatopsia (no color) | #B5B5B5 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FC5DA
#3FC5DA
oklch(76.1% 0.116 210.2)
- #F29585
#F29585
oklch(76.2% 0.115 30.5)
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 #3FC5DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Dark Turquoise #00CED1 ΔE 0.035
- Medium Turquoise #48D1CC ΔE 0.046
- Bright Sky Blue #02CCFE ΔE 0.050
- Aqua Blue #02D8E9 ΔE 0.050
- Deep Sky Blue #00BFFF ΔE 0.063
- Lightblue #7BC8F6 ΔE 0.064
- Turquoise Blue #06B1C4 ΔE 0.065
Use #3FC5DA 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.