#63D4E9
Closest named color: Sky Blue (#87CEEB). oklch(81.2% 0.106 211.5), rgb(99, 212, 233).
Aa
Black text reads best on this color (12.12:1).
About this color
#63D4E9 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.106 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Sky Blue (#87CEEB), ΔE 0.034 away. Black text reads best on it, at 12.12:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Sky Blue (#87CEEB) |
| Black text | 12.12:1 |
| White text | 1.73:1 |
Values
| HEX | #63D4E9 |
| RGB | rgb(99, 212, 233) |
| HSL | hsl(189, 75%, 65%) |
| OKLCH | oklch(81.2% 0.106 211.5) |
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 #63D4E9 | 1.73:1 | Fails | Lc -35.0 | Non-text elements, placeholder text |
| Black text on #63D4E9 | 12.12:1 | AAA | Lc 72.7 | Content text, not long reading |
| #63D4E9 text on white | 1.73:1 | Fails | Lc 31.1 | Non-text elements, placeholder text |
| #63D4E9 text on black | 12.12:1 | AAA | Lc -71.6 | 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
#EBF8FB
oklch(97% 0.014 213.1)
-
Step 100
100
#D4F0F6
oklch(93.7% 0.03 212)
-
Step 200
200
#ACE4F0
oklch(88.4% 0.059 212.3)
-
Step 300
300 (this color)
#63D4E9
oklch(81.2% 0.106 211.5)
-
Step 400
400
#00B4CC
oklch(70.6% 0.123 211.4)
-
Step 500
500
#009AAF
oklch(63% 0.11 211.6)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004A55
oklch(37.5% 0.065 211.6)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#63D4E9 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) | #C3CDEA | 0.099 |
| Deuteranopia (no green cones) | #AFBEE9 | 0.091 |
| Tritanopia (no blue cones) | #00DDDA | 0.051 |
| Achromatopsia (no color) | #C5C5C5 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63D4E9
#63D4E9
oklch(81.2% 0.106 211.5)
- #FFA897
#FFA897
oklch(81.3% 0.106 31.6)
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 #63D4E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sky Blue #87CEEB ΔE 0.034
- Aqua Blue #02D8E9 ΔE 0.035
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Lightblue #7BC8F6 ΔE 0.046
- Light Sky Blue #87CEFA ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.047
- Sky #82CAFC ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.056
Use #63D4E9 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.