#64B3FB
Closest named color: Carolina Blue (#8AB8FE). oklch(74.6% 0.131 247.9), rgb(100, 179, 251).
Aa
Black text reads best on this color (9.38:1).
About this color
#64B3FB is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.131 and its hue 248°. 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 9.38:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 9.38:1 |
| White text | 2.23:1 |
Values
| HEX | #64B3FB |
| RGB | rgb(100, 179, 251) |
| HSL | hsl(209, 95%, 69%) |
| OKLCH | oklch(74.6% 0.131 247.9) |
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 #64B3FB | 2.23:1 | Fails | Lc -48.7 | Large or bold text, headings |
| Black text on #64B3FB | 9.38:1 | AAA | Lc 60.1 | Content text, not long reading |
| #64B3FB text on white | 2.23:1 | Fails | Lc 43.9 | Non-text elements, placeholder text |
| #64B3FB text on black | 9.38:1 | AAA | Lc -58.3 | 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
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C2DDF6
oklch(88.6% 0.045 246.3)
-
Step 300
300
#97C6F3
oklch(80.9% 0.081 247.8)
-
Step 400
400 (this color)
#64B3FB
oklch(74.6% 0.131 247.9)
-
Step 500
500
#0B8EE8
oklch(63.1% 0.167 247.9)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#032846
oklch(27% 0.069 248.1)
#64B3FB 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) | #94B5FE | 0.051 |
| Deuteranopia (no green cones) | #80A7FA | 0.039 |
| Tritanopia (no blue cones) | #00C4CC | 0.105 |
| Achromatopsia (no color) | #ADADAD | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B3FB
#64B3FB
oklch(74.6% 0.131 247.9)
- #E39C47
#E39C47
oklch(74.7% 0.131 68.1)
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 #64B3FB, 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 0.047
- Lightblue #7BC8F6 ΔE 0.066
- Vivid Sky Blue #4CC9F0 ΔE 0.067
- Bright Sky Blue #02CCFE ΔE 0.072
- Sky #82CAFC ΔE 0.072
- Periwinkle Blue #8F99FB ΔE 0.077
- Pastel Blue #A2BFFE ΔE 0.077
Use #64B3FB 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.