#63AFFA
Closest named color: Carolina Blue (#8AB8FE). oklch(73.7% 0.133 249.8), rgb(99, 175, 250).
Aa
Black text reads best on this color (9.04:1).
About this color
#63AFFA is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.133 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.049 away. Black text reads best on it, at 9.04:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 9.04:1 |
| White text | 2.32:1 |
Values
| HEX | #63AFFA |
| RGB | rgb(99, 175, 250) |
| HSL | hsl(210, 94%, 68%) |
| OKLCH | oklch(73.7% 0.133 249.8) |
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 #63AFFA | 2.32:1 | Fails | Lc -50.5 | Large or bold text, headings |
| Black text on #63AFFA | 9.04:1 | AAA | Lc 58.4 | Large or bold text, headings |
| #63AFFA text on white | 2.32:1 | Fails | Lc 45.6 | Large or bold text, headings |
| #63AFFA text on black | 9.04:1 | AAA | Lc -56.5 | 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
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#98C5F5
oklch(80.9% 0.083 250.5)
-
Step 400
400 (this color)
#63AFFA
oklch(73.7% 0.133 249.8)
-
Step 500
500
#178DEB
oklch(63.2% 0.17 249.7)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950
#042847
oklch(27.1% 0.07 249.3)
#63AFFA 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) | #8FB2FD | 0.048 |
| Deuteranopia (no green cones) | #7BA3F9 | 0.037 |
| Tritanopia (no blue cones) | #00C1CA | 0.108 |
| Achromatopsia (no color) | #AAAAAA | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AFFA
#63AFFA
oklch(73.7% 0.133 249.8)
- #DF993F
#DF993F
oklch(73.6% 0.133 69.5)
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 #63AFFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.049
- Deep Sky Blue #00BFFF ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.068
- Periwinkle Blue #8F99FB ΔE 0.070
- Vivid Sky Blue #4CC9F0 ΔE 0.076
- Lightblue #7BC8F6 ΔE 0.077
- Chefchaouen Blue #4895EF ΔE 0.077
- Bright Sky Blue #02CCFE ΔE 0.081
Use #63AFFA 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.