#63CEFB
Closest named color: Lightblue (#7BC8F6). oklch(80.6% 0.117 228.4), rgb(99, 206, 251).
Aa
Black text reads best on this color (11.75:1).
About this color
#63CEFB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.117 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Lightblue (#7BC8F6), ΔE 0.023 away. Black text reads best on it, at 11.75:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Lightblue (#7BC8F6) |
| Black text | 11.75:1 |
| White text | 1.78:1 |
Values
| HEX | #63CEFB |
| RGB | rgb(99, 206, 251) |
| HSL | hsl(198, 95%, 69%) |
| OKLCH | oklch(80.6% 0.117 228.4) |
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 #63CEFB | 1.78:1 | Fails | Lc -36.8 | Non-text elements, placeholder text |
| Black text on #63CEFB | 11.75:1 | AAA | Lc 71.1 | Content text, not long reading |
| #63CEFB text on white | 1.78:1 | Fails | Lc 32.8 | Non-text elements, placeholder text |
| #63CEFB text on black | 11.75:1 | AAA | Lc -69.9 | 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
#D4EFFC
oklch(93.6% 0.033 228.3)
-
Step 200
200
#ADE2FB
oklch(88.4% 0.064 228.5)
-
Step 300
300 (this color)
#63CEFB
oklch(80.6% 0.117 228.4)
-
Step 400
400
#00B0E4
oklch(70.7% 0.138 228.2)
-
Step 500
500
#0097C4
oklch(63.2% 0.123 228.1)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004860
oklch(37.5% 0.074 228.7)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#63CEFB 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) | #B7CBFD | 0.085 |
| Deuteranopia (no green cones) | #A1BBFA | 0.074 |
| Tritanopia (no blue cones) | #00DBDD | 0.074 |
| Achromatopsia (no color) | #C2C2C2 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CEFB
#63CEFB
oklch(80.6% 0.117 228.4)
- #FDA87B
#FDA87B
oklch(80.5% 0.117 48.4)
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 #63CEFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lightblue #7BC8F6 ΔE 0.023
- Vivid Sky Blue #4CC9F0 ΔE 0.027
- Sky #82CAFC ΔE 0.027
- Light Sky Blue #87CEFA ΔE 0.031
- Sky Blue #87CEEB ΔE 0.036
- Bright Sky Blue #02CCFE ΔE 0.038
- Aqua Blue #02D8E9 ΔE 0.055
- Baby Blue #A2CFFE ΔE 0.061
Use #63CEFB 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.