#63BEE5
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76% 0.103 228.3), rgb(99, 190, 229).
Aa
Black text reads best on this color (10.02:1).
About this color
#63BEE5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.103 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.031 away. Black text reads best on it, at 10.02:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.02:1 |
| White text | 2.09:1 |
Values
| HEX | #63BEE5 |
| RGB | rgb(99, 190, 229) |
| HSL | hsl(198, 71%, 64%) |
| OKLCH | oklch(76% 0.103 228.3) |
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 #63BEE5 | 2.09:1 | Fails | Lc -45.4 | Large or bold text, headings |
| Black text on #63BEE5 | 10.02:1 | AAA | Lc 63.2 | Content text, not long reading |
| #63BEE5 text on white | 2.09:1 | Fails | Lc 40.8 | Non-text elements, placeholder text |
| #63BEE5 text on black | 10.02:1 | AAA | Lc -61.5 | 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
#ECF8FD
oklch(97.2% 0.014 224.5)
-
Step 100
100
#D6EEFA
oklch(93.5% 0.03 229.2)
-
Step 200
200
#B2E1F7
oklch(88.4% 0.057 228.1)
-
Step 300
300 (this color)
#63BEE5
oklch(76% 0.103 228.3)
-
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
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#63BEE5 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) | #AABBE7 | 0.076 |
| Deuteranopia (no green cones) | #97ADE5 | 0.066 |
| Tritanopia (no blue cones) | #00C9CB | 0.069 |
| Achromatopsia (no color) | #B3B3B3 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BEE5
#63BEE5
oklch(76% 0.103 228.3)
- #E79D76
#E79D76
oklch(76% 0.103 48.5)
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 #63BEE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.031
- Lightblue #7BC8F6 ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.051
- Sky #82CAFC ΔE 0.054
- Light Cornflower Blue #98C1D9 ΔE 0.056
- Sky Blue #87CEEB ΔE 0.059
- Carolina Blue #8AB8FE ΔE 0.059
Use #63BEE5 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.