#5ACFFF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(80.7% 0.124 228.4), rgb(90, 207, 255).
Aa
Black text reads best on this color (11.80:1).
About this color
#5ACFFF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.124 and its hue 228°. 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 11.80:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.80:1 |
| White text | 1.77:1 |
Values
| HEX | #5ACFFF |
| RGB | rgb(90, 207, 255) |
| HSL | hsl(197, 100%, 68%) |
| OKLCH | oklch(80.7% 0.124 228.4) |
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 #5ACFFF | 1.77:1 | Fails | Lc -36.5 | Non-text elements, placeholder text |
| Black text on #5ACFFF | 11.80:1 | AAA | Lc 71.4 | Content text, not long reading |
| #5ACFFF text on white | 1.77:1 | Fails | Lc 32.5 | Non-text elements, placeholder text |
| #5ACFFF text on black | 11.80:1 | AAA | Lc -70.2 | 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
#EBF8FE
oklch(97.1% 0.016 227)
-
Step 100
100
#D2EFFD
oklch(93.5% 0.036 228.4)
-
Step 200
200
#A9E3FE
oklch(88.5% 0.07 228.3)
-
Step 300
300 (this color)
#5ACFFF
oklch(80.7% 0.124 228.4)
-
Step 400
400
#00B0E4
oklch(70.7% 0.138 228.2)
-
Step 500
500
#0097C4
oklch(63.2% 0.123 228.1)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004860
oklch(37.5% 0.074 228.7)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#5ACFFF 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) | #B6CCFF | 0.089 |
| Deuteranopia (no green cones) | #9FBBFE | 0.078 |
| Tritanopia (no blue cones) | #00DDDF | 0.075 |
| Achromatopsia (no color) | #C2C2C2 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5ACFFF
#5ACFFF
oklch(80.7% 0.124 228.4)
- #FFA879
#FFA879
oklch(80.7% 0.12 48.8)
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 #5ACFFF, 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
- Lightblue #7BC8F6 ΔE 0.029
- Sky #82CAFC ΔE 0.033
- Bright Sky Blue #02CCFE ΔE 0.033
- Light Sky Blue #87CEFA ΔE 0.037
- Sky Blue #87CEEB ΔE 0.043
- Aqua Blue #02D8E9 ΔE 0.055
- Deep Sky Blue #00BFFF ΔE 0.059
Use #5ACFFF 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.