#64C4E9
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.6% 0.105 225.8), rgb(100, 196, 233).
Aa
Black text reads best on this color (10.61:1).
About this color
#64C4E9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.105 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.019 away. Black text reads best on it, at 10.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.61:1 |
| White text | 1.97:1 |
Values
| HEX | #64C4E9 |
| RGB | rgb(100, 196, 233) |
| HSL | hsl(197, 75%, 65%) |
| OKLCH | oklch(77.6% 0.105 225.8) |
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 #64C4E9 | 1.97:1 | Fails | Lc -42.4 | Non-text elements, placeholder text |
| Black text on #64C4E9 | 10.61:1 | AAA | Lc 65.9 | Content text, not long reading |
| #64C4E9 text on white | 1.97:1 | Fails | Lc 38.0 | Non-text elements, placeholder text |
| #64C4E9 text on black | 10.61:1 | AAA | Lc -64.4 | 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
#ECF8FD
oklch(97.2% 0.014 224.5)
-
Step 100
100
#D6EFFA
oklch(93.7% 0.03 226)
-
Step 200
200
#B1E2F7
oklch(88.5% 0.058 226)
-
Step 300
300 (this color)
#64C4E9
oklch(77.6% 0.105 225.8)
-
Step 400
400
#00B1E0
oklch(70.8% 0.135 225.5)
-
Step 500
500
#0097C1
oklch(63% 0.121 226.4)
-
Step 600
600
#007FA2
oklch(55.5% 0.106 225.7)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#64C4E9 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) | #B0C0EB | 0.080 |
| Deuteranopia (no green cones) | #9DB2E9 | 0.071 |
| Tritanopia (no blue cones) | #00CFD0 | 0.067 |
| Achromatopsia (no color) | #B8B8B8 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64C4E9
#64C4E9
oklch(77.6% 0.105 225.8)
- #EEA17D
#EEA17D
oklch(77.6% 0.104 45.8)
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 #64C4E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.019
- Lightblue #7BC8F6 ΔE 0.031
- Sky #82CAFC ΔE 0.043
- Bright Sky Blue #02CCFE ΔE 0.044
- Sky Blue #87CEEB ΔE 0.045
- Light Sky Blue #87CEFA ΔE 0.050
- Light Cornflower Blue #98C1D9 ΔE 0.052
- Deep Sky Blue #00BFFF ΔE 0.055
Use #64C4E9 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.