#63AFE1
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.5% 0.105 239.3), rgb(99, 175, 225).
Aa
Black text reads best on this color (8.74:1).
About this color
#63AFE1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.105 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.060 away. Black text reads best on it, at 8.74:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.74:1 |
| White text | 2.40:1 |
Values
| HEX | #63AFE1 |
| RGB | rgb(99, 175, 225) |
| HSL | hsl(204, 68%, 64%) |
| OKLCH | oklch(72.5% 0.105 239.3) |
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 #63AFE1 | 2.40:1 | Fails | Lc -52.1 | Large or bold text, headings |
| Black text on #63AFE1 | 8.74:1 | AAA | Lc 56.9 | Large or bold text, headings |
| #63AFE1 text on white | 2.40:1 | Fails | Lc 47.1 | Large or bold text, headings |
| #63AFE1 text on black | 8.74:1 | AAA | Lc -54.9 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEF
oklch(88.5% 0.036 239.2)
-
Step 300
300
#9AC7E7
oklch(80.9% 0.066 239.6)
-
Step 400
400 (this color)
#63AFE1
oklch(72.5% 0.105 239.3)
-
Step 500
500
#1E93D1
oklch(63.2% 0.134 238.9)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#052A3E
oklch(27.1% 0.055 237.7)
#63AFE1 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) | #98AFE3 | 0.058 |
| Deuteranopia (no green cones) | #87A2E0 | 0.048 |
| Tritanopia (no blue cones) | #00BCC0 | 0.083 |
| Achromatopsia (no color) | #A7A7A7 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AFE1
#63AFE1
oklch(72.5% 0.105 239.3)
- #D79660
#D79660
oklch(72.6% 0.105 59.8)
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 #63AFE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.060
- Carolina Blue #8AB8FE ΔE 0.064
- Greyblue #77A1B5 ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.068
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Bluegrey #85A3B2 ΔE 0.071
- Lightblue #7BC8F6 ΔE 0.076
- Bluey Grey #89A0B0 ΔE 0.077
Use #63AFE1 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.