#64CBFF
Closest named color: Lightblue (#7BC8F6). oklch(80.1% 0.121 233), rgb(100, 203, 255).
Aa
Black text reads best on this color (11.52:1).
About this color
#64CBFF is a light, moderately saturated blue. In OKLCH its lightness is 80%, its chroma 0.121 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.021 away. Black text reads best on it, at 11.52:1.
| Hue family | Blues |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.52:1 |
| White text | 1.82:1 |
Values
| HEX | #64CBFF |
| RGB | rgb(100, 203, 255) |
| HSL | hsl(200, 100%, 70%) |
| OKLCH | oklch(80.1% 0.121 233) |
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 #64CBFF | 1.82:1 | Fails | Lc -37.9 | Non-text elements, placeholder text |
| Black text on #64CBFF | 11.52:1 | AAA | Lc 70.1 | Content text, not long reading |
| #64CBFF text on white | 1.82:1 | Fails | Lc 33.8 | Non-text elements, placeholder text |
| #64CBFF text on black | 11.52:1 | AAA | Lc -68.8 | 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
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D4EFFE
oklch(93.7% 0.035 232)
-
Step 200
200
#ADE2FF
oklch(88.6% 0.068 232.4)
-
Step 300
300 (this color)
#64CBFF
oklch(80.1% 0.121 233)
-
Step 400
400
#00AEEC
oklch(70.6% 0.146 233.1)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#64CBFF 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) | #B2C9FF | 0.079 |
| Deuteranopia (no green cones) | #9CB9FE | 0.067 |
| Tritanopia (no blue cones) | #00D9DC | 0.082 |
| Achromatopsia (no color) | #C0C0C0 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64CBFF
#64CBFF
oklch(80.1% 0.121 233)
- #FBA872
#FBA872
oklch(80.2% 0.12 53.2)
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 #64CBFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.021
- Sky #82CAFC ΔE 0.025
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Light Sky Blue #87CEFA ΔE 0.033
- Bright Sky Blue #02CCFE ΔE 0.037
- Sky Blue #87CEEB ΔE 0.043
- Deep Sky Blue #00BFFF ΔE 0.056
- Carolina Blue #8AB8FE ΔE 0.057
Use #64CBFF 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.