#3FCDE9
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.6% 0.123 214), rgb(63, 205, 233).
Aa
Black text reads best on this color (11.12:1).
About this color
#3FCDE9 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.123 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.018 away. Black text reads best on it, at 11.12:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.12:1 |
| White text | 1.88:1 |
Values
| HEX | #3FCDE9 |
| RGB | rgb(63, 205, 233) |
| HSL | hsl(190, 79%, 58%) |
| OKLCH | oklch(78.6% 0.123 214) |
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 #3FCDE9 | 1.88:1 | Fails | Lc -39.7 | Non-text elements, placeholder text |
| Black text on #3FCDE9 | 11.12:1 | AAA | Lc 68.4 | Content text, not long reading |
| #3FCDE9 text on white | 1.88:1 | Fails | Lc 35.5 | Non-text elements, placeholder text |
| #3FCDE9 text on black | 11.12:1 | AAA | Lc -67.1 | 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
#EAF9FC
oklch(97.2% 0.016 211)
-
Step 100
100
#D0F1F8
oklch(93.7% 0.036 211.9)
-
Step 200
200
#A5E5F5
oklch(88.4% 0.068 215)
-
Step 300
300 (this color)
#3FCDE9
oklch(78.6% 0.123 214)
-
Step 400
400
#00B4D0
oklch(70.8% 0.124 214)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008196
oklch(55.5% 0.098 214.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#3FCDE9 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) | #B9C6EB | 0.112 |
| Deuteranopia (no green cones) | #A1B5E9 | 0.100 |
| Tritanopia (no blue cones) | #00D8D6 | 0.049 |
| Achromatopsia (no color) | #BDBDBD | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCDE9
#3FCDE9
oklch(78.6% 0.123 214)
- #FD9B84
#FD9B84
oklch(78.5% 0.123 34)
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 #3FCDE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.018
- Aqua Blue #02D8E9 ΔE 0.032
- Bright Sky Blue #02CCFE ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.042
- Medium Turquoise #48D1CC ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.050
- Sky Blue #87CEEB ΔE 0.054
- Sky #82CAFC ΔE 0.060
Use #3FCDE9 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.