#64D8EF
Closest named color: Sky Blue (#87CEEB). oklch(82.4% 0.109 212.6), rgb(100, 216, 239).
Aa
Black text reads best on this color (12.61:1).
About this color
#64D8EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.109 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Sky Blue (#87CEEB), ΔE 0.036 away. Black text reads best on it, at 12.61:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Sky Blue (#87CEEB) |
| Black text | 12.61:1 |
| White text | 1.66:1 |
Values
| HEX | #64D8EF |
| RGB | rgb(100, 216, 239) |
| HSL | hsl(190, 81%, 66%) |
| OKLCH | oklch(82.4% 0.109 212.6) |
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 #64D8EF | 1.66:1 | Fails | Lc -32.7 | Non-text elements, placeholder text |
| Black text on #64D8EF | 12.61:1 | AAA | Lc 74.8 | Content text, not long reading |
| #64D8EF text on white | 1.66:1 | Fails | Lc 29.0 | Dividers and decoration only |
| #64D8EF text on black | 12.61:1 | AAA | Lc -73.9 | 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
#EBF8FB
oklch(97% 0.014 213.1)
-
Step 100
100
#D3F0F6
oklch(93.6% 0.031 211.5)
-
Step 200
200
#ABE4F1
oklch(88.4% 0.061 213.3)
-
Step 300
300 (this color)
#64D8EF
oklch(82.4% 0.109 212.6)
-
Step 400
400
#00B4CE
oklch(70.7% 0.124 212.8)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#64D8EF 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) | #C6D1F0 | 0.100 |
| Deuteranopia (no green cones) | #B1C2EF | 0.091 |
| Tritanopia (no blue cones) | #00E1DF | 0.052 |
| Achromatopsia (no color) | #C8C8C8 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64D8EF
#64D8EF
oklch(82.4% 0.109 212.6)
- #FFAE9C
#FFAE9C
oklch(82.4% 0.099 33)
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 #64D8EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky Blue #87CEEB ΔE 0.036
- Aqua Blue #02D8E9 ΔE 0.038
- Light Sky Blue #87CEFA ΔE 0.045
- Vivid Sky Blue #4CC9F0 ΔE 0.048
- Lightblue #7BC8F6 ΔE 0.050
- Sky #82CAFC ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.056
- Robin's Egg #6DEDFD ΔE 0.057
Use #64D8EF 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.