#63BFDB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.9% 0.096 220.2), rgb(99, 191, 219).
Aa
Black text reads best on this color (10.00:1).
About this color
#63BFDB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.096 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.035 away. Black text reads best on it, at 10.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.00:1 |
| White text | 2.09:1 |
Values
| HEX | #63BFDB |
| RGB | rgb(99, 191, 219) |
| HSL | hsl(194, 62%, 62%) |
| OKLCH | oklch(75.9% 0.096 220.2) |
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 #63BFDB | 2.09:1 | Fails | Lc -45.5 | Large or bold text, headings |
| Black text on #63BFDB | 10.00:1 | AAA | Lc 63.1 | Content text, not long reading |
| #63BFDB text on white | 2.09:1 | Fails | Lc 40.9 | Non-text elements, placeholder text |
| #63BFDB text on black | 10.00:1 | AAA | Lc -61.4 | 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
#EDF8FB
oklch(97.2% 0.012 215.8)
-
Step 100
100
#D7EFF7
oklch(93.7% 0.028 219.8)
-
Step 200
200
#B3E2F2
oklch(88.5% 0.053 220.6)
-
Step 300
300 (this color)
#63BFDB
oklch(75.9% 0.096 220.2)
-
Step 400
400
#00B2D8
oklch(70.7% 0.129 220.4)
-
Step 500
500
#0099B9
oklch(63.1% 0.115 219.7)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5B
oklch(37.8% 0.069 219.8)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#63BFDB 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) | #AEBBDD | 0.081 |
| Deuteranopia (no green cones) | #9CADDB | 0.073 |
| Tritanopia (no blue cones) | #00C8C8 | 0.059 |
| Achromatopsia (no color) | #B3B3B3 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BFDB
#63BFDB
oklch(75.9% 0.096 220.2)
- #E69C82
#E69C82
oklch(75.9% 0.096 40.1)
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 #63BFDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Lightblue #7BC8F6 ΔE 0.050
- Light Cornflower Blue #98C1D9 ΔE 0.054
- Bright Sky Blue #02CCFE ΔE 0.058
- Light Grey Blue #9DBCD4 ΔE 0.058
- Sky Blue #87CEEB ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.059
- Sky #82CAFC ΔE 0.062
Use #63BFDB 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.