#4FBFE9
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.7% 0.117 226.4), rgb(79, 191, 233).
Aa
Black text reads best on this color (9.96:1).
About this color
#4FBFE9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.117 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.027 away. Black text reads best on it, at 9.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.96:1 |
| White text | 2.10:1 |
Values
| HEX | #4FBFE9 |
| RGB | rgb(79, 191, 233) |
| HSL | hsl(196, 78%, 61%) |
| OKLCH | oklch(75.7% 0.117 226.4) |
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 #4FBFE9 | 2.10:1 | Fails | Lc -45.6 | Large or bold text, headings |
| Black text on #4FBFE9 | 9.96:1 | AAA | Lc 62.9 | Content text, not long reading |
| #4FBFE9 text on white | 2.10:1 | Fails | Lc 41.0 | Non-text elements, placeholder text |
| #4FBFE9 text on black | 9.96:1 | AAA | Lc -61.3 | 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 400.
-
Step 50
50
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DCEDF5
oklch(93.6% 0.021 227.5)
-
Step 200
200
#BEDFEE
oklch(88.4% 0.04 227)
-
Step 300
300
#8DCBE5
oklch(80.9% 0.073 226.1)
-
Step 400
400 (this color)
#4FBFE9
oklch(75.7% 0.117 226.4)
-
Step 500
500
#0097C1
oklch(63% 0.121 226.4)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#4FBFE9 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) | #A8BBEB | 0.087 |
| Deuteranopia (no green cones) | #93ACE9 | 0.077 |
| Tritanopia (no blue cones) | #00CBCD | 0.066 |
| Achromatopsia (no color) | #B3B3B3 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FBFE9
#4FBFE9
oklch(75.7% 0.117 226.4)
- #ED986F
#ED986F
oklch(75.7% 0.117 46.2)
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 #4FBFE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.027
- Deep Sky Blue #00BFFF ΔE 0.039
- Bright Sky Blue #02CCFE ΔE 0.042
- Lightblue #7BC8F6 ΔE 0.049
- Sky #82CAFC ΔE 0.061
- Carolina Blue #8AB8FE ΔE 0.067
- Dark Turquoise #00CED1 ΔE 0.067
- Sky Blue #87CEEB ΔE 0.067
Use #4FBFE9 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.