#4FC5FF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.1% 0.133 233.6), rgb(79, 197, 255).
Aa
Black text reads best on this color (10.76:1).
About this color
#4FC5FF is a light, moderately saturated blue. In OKLCH its lightness is 78%, its chroma 0.133 and its hue 234°. 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 10.76:1.
| Hue family | Blues |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.76:1 |
| White text | 1.95:1 |
Values
| HEX | #4FC5FF |
| RGB | rgb(79, 197, 255) |
| HSL | hsl(200, 100%, 65%) |
| OKLCH | oklch(78.1% 0.133 233.6) |
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 #4FC5FF | 1.95:1 | Fails | Lc -41.5 | Non-text elements, placeholder text |
| Black text on #4FC5FF | 10.76:1 | AAA | Lc 66.7 | Content text, not long reading |
| #4FC5FF text on white | 1.95:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #4FC5FF text on black | 10.76:1 | AAA | Lc -65.3 | 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
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D3EFFF
oklch(93.7% 0.037 232.8)
-
Step 200
200
#AEE1FF
oklch(88.4% 0.067 234.3)
-
Step 300
300 (this color)
#4FC5FF
oklch(78.1% 0.133 233.6)
-
Step 400
400
#00AEED
oklch(70.7% 0.147 233.5)
-
Step 500
500
#0095CC
oklch(63.1% 0.132 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#4FC5FF 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) | #A9C3FF | 0.085 |
| Deuteranopia (no green cones) | #91B2FE | 0.072 |
| Tritanopia (no blue cones) | #00D4D9 | 0.083 |
| Achromatopsia (no color) | #BABABA | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FC5FF
#4FC5FF
oklch(78.1% 0.133 233.6)
- #F99F61
#F99F61
oklch(78.1% 0.133 54)
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 #4FC5FF, 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
- Bright Sky Blue #02CCFE ΔE 0.028
- Deep Sky Blue #00BFFF ΔE 0.033
- Lightblue #7BC8F6 ΔE 0.038
- Sky #82CAFC ΔE 0.045
- Light Sky Blue #87CEFA ΔE 0.056
- Carolina Blue #8AB8FE ΔE 0.057
- Sky Blue #87CEEB ΔE 0.063
Use #4FC5FF 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.