#64C3FF
Closest named color: Lightblue (#7BC8F6). oklch(78.3% 0.124 238.8), rgb(100, 195, 255).
Aa
Black text reads best on this color (10.79:1).
About this color
#64C3FF is a light, moderately saturated blue. In OKLCH its lightness is 78%, its chroma 0.124 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.030 away. Black text reads best on it, at 10.79:1.
| Hue family | Blues |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 10.79:1 |
| White text | 1.94:1 |
Values
| HEX | #64C3FF |
| RGB | rgb(100, 195, 255) |
| HSL | hsl(203, 100%, 70%) |
| OKLCH | oklch(78.3% 0.124 238.8) |
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 #64C3FF | 1.94:1 | Fails | Lc -41.5 | Non-text elements, placeholder text |
| Black text on #64C3FF | 10.79:1 | AAA | Lc 66.8 | Content text, not long reading |
| #64C3FF text on white | 1.94:1 | Fails | Lc 37.1 | Non-text elements, placeholder text |
| #64C3FF text on black | 10.79:1 | 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
#ECF7FF
oklch(97% 0.016 239.1)
-
Step 100
100
#D6EEFF
oklch(93.7% 0.034 238.7)
-
Step 200
200
#B3E0FF
oklch(88.5% 0.064 238.5)
-
Step 300
300 (this color)
#64C3FF
oklch(78.3% 0.124 238.8)
-
Step 400
400
#00ACF8
oklch(70.8% 0.159 238.8)
-
Step 500
500
#0093D5
oklch(63.1% 0.142 238.9)
-
Step 600
600
#007CB4
oklch(55.7% 0.125 238.6)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#64C3FF 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) | #A7C3FF | 0.068 |
| Deuteranopia (no green cones) | #92B3FE | 0.057 |
| Tritanopia (no blue cones) | #00D2D7 | 0.091 |
| Achromatopsia (no color) | #BABABA | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64C3FF
#64C3FF
oklch(78.3% 0.124 238.8)
- #F3A463
#F3A463
oklch(78.3% 0.124 59)
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 #64C3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.030
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Sky #82CAFC ΔE 0.036
- Bright Sky Blue #02CCFE ΔE 0.042
- Carolina Blue #8AB8FE ΔE 0.043
- Deep Sky Blue #00BFFF ΔE 0.044
- Light Sky Blue #87CEFA ΔE 0.048
- Sky Blue #87CEEB ΔE 0.058
Use #64C3FF 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.