#64B3FF
Closest named color: Carolina Blue (#8AB8FE). oklch(74.8% 0.135 249.2), rgb(100, 179, 255).
Aa
Black text reads best on this color (9.43:1).
About this color
#64B3FF is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.135 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.042 away. Black text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 9.43:1 |
| White text | 2.22:1 |
Values
| HEX | #64B3FF |
| RGB | rgb(100, 179, 255) |
| HSL | hsl(209, 100%, 70%) |
| OKLCH | oklch(74.8% 0.135 249.2) |
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 #64B3FF | 2.22:1 | Fails | Lc -48.4 | Large or bold text, headings |
| Black text on #64B3FF | 9.43:1 | AAA | Lc 60.3 | Content text, not long reading |
| #64B3FF text on white | 2.22:1 | Fails | Lc 43.6 | Non-text elements, placeholder text |
| #64B3FF text on black | 9.43:1 | AAA | Lc -58.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C2DCF8
oklch(88.4% 0.048 250.3)
-
Step 300
300
#96C6F5
oklch(81% 0.084 248.4)
-
Step 400
400 (this color)
#64B3FF
oklch(74.8% 0.135 249.2)
-
Step 500
500
#098DEC
oklch(63.1% 0.173 249.2)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#022847
oklch(27% 0.071 248.4)
#64B3FF 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) | #92B6FF | 0.049 |
| Deuteranopia (no green cones) | #7DA7FE | 0.037 |
| Tritanopia (no blue cones) | #00C5CE | 0.108 |
| Achromatopsia (no color) | #AEAEAE | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B3FF
#64B3FF
oklch(74.8% 0.135 249.2)
- #E49C41
#E49C41
oklch(74.8% 0.135 69.1)
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 #64B3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.048
- Lightblue #7BC8F6 ΔE 0.068
- Vivid Sky Blue #4CC9F0 ΔE 0.070
- Bright Sky Blue #02CCFE ΔE 0.073
- Sky #82CAFC ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.076
- Pastel Blue #A2BFFE ΔE 0.077
Use #64B3FF 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.