#64C4E2
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(77.3% 0.1 220.9), rgb(100, 196, 226).
Aa
Black text reads best on this color (10.53:1).
About this color
#64C4E2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.100 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.024 away. Black text reads best on it, at 10.53:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.53:1 |
| White text | 1.99:1 |
Values
| HEX | #64C4E2 |
| RGB | rgb(100, 196, 226) |
| HSL | hsl(194, 68%, 64%) |
| OKLCH | oklch(77.3% 0.1 220.9) |
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 #64C4E2 | 1.99:1 | Fails | Lc -42.8 | Non-text elements, placeholder text |
| Black text on #64C4E2 | 10.53:1 | AAA | Lc 65.6 | Content text, not long reading |
| #64C4E2 text on white | 1.99:1 | Fails | Lc 38.4 | Non-text elements, placeholder text |
| #64C4E2 text on black | 10.53:1 | AAA | Lc -64.0 | 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
#ECF8FC
oklch(97.1% 0.014 219.6)
-
Step 100
100
#D6EFF8
oklch(93.7% 0.029 221.4)
-
Step 200
200
#B1E2F3
oklch(88.4% 0.056 221.1)
-
Step 300
300 (this color)
#64C4E2
oklch(77.3% 0.1 220.9)
-
Step 400
400
#00B2D9
oklch(70.7% 0.13 221)
-
Step 500
500
#0099BA
oklch(63.2% 0.115 220.3)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#64C4E2 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) | #B2C0E4 | 0.083 |
| Deuteranopia (no green cones) | #9FB2E2 | 0.074 |
| Tritanopia (no blue cones) | #00CECD | 0.062 |
| Achromatopsia (no color) | #B8B8B8 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64C4E2
#64C4E2
oklch(77.3% 0.1 220.9)
- #ECA084
#ECA084
oklch(77.4% 0.099 41)
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 #64C4E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.024
- Lightblue #7BC8F6 ΔE 0.038
- Sky Blue #87CEEB ΔE 0.046
- Bright Sky Blue #02CCFE ΔE 0.049
- Sky #82CAFC ΔE 0.050
- Light Cornflower Blue #98C1D9 ΔE 0.050
- Light Sky Blue #87CEFA ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.058
Use #64C4E2 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.