#63D4FF
Closest named color: Light Sky Blue (#87CEFA). oklch(82.1% 0.119 226.1), rgb(99, 212, 255).
Aa
Black text reads best on this color (12.39:1).
About this color
#63D4FF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.119 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sky Blue (#87CEFA), ΔE 0.031 away. Black text reads best on it, at 12.39:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Light Sky Blue (#87CEFA) |
| Black text | 12.39:1 |
| White text | 1.69:1 |
Values
| HEX | #63D4FF |
| RGB | rgb(99, 212, 255) |
| HSL | hsl(197, 100%, 69%) |
| OKLCH | oklch(82.1% 0.119 226.1) |
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 #63D4FF | 1.69:1 | Fails | Lc -33.7 | Non-text elements, placeholder text |
| Black text on #63D4FF | 12.39:1 | AAA | Lc 73.9 | Content text, not long reading |
| #63D4FF text on white | 1.69:1 | Fails | Lc 29.9 | Dividers and decoration only |
| #63D4FF text on black | 12.39:1 | AAA | Lc -72.9 | 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
#EBF8FE
oklch(97.1% 0.016 227)
-
Step 100
100
#D3EFFC
oklch(93.6% 0.034 227.4)
-
Step 200
200
#ABE3FB
oklch(88.5% 0.066 226.2)
-
Step 300
300 (this color)
#63D4FF
oklch(82.1% 0.119 226.1)
-
Step 400
400
#00B1E1
oklch(70.8% 0.135 226)
-
Step 500
500
#0097C1
oklch(63% 0.121 226.4)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#63D4FF 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) | #BDD0FF | 0.090 |
| Deuteranopia (no green cones) | #A7C0FF | 0.079 |
| Tritanopia (no blue cones) | #00E1E2 | 0.072 |
| Achromatopsia (no color) | #C7C7C7 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63D4FF
#63D4FF
oklch(82.1% 0.119 226.1)
- #FFAE88
#FFAE88
oklch(82% 0.108 45.9)
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 #63D4FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sky Blue #87CEFA ΔE 0.031
- Sky #82CAFC ΔE 0.033
- Lightblue #7BC8F6 ΔE 0.034
- Sky Blue #87CEEB ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.039
- Bright Sky Blue #02CCFE ΔE 0.046
- Aqua Blue #02D8E9 ΔE 0.053
- Baby Blue #A2CFFE ΔE 0.058
Use #63D4FF 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.