#63D4DF
Closest named color: Aqua Blue (#02D8E9). oklch(80.9% 0.103 203.9), rgb(99, 212, 223).
Aa
Black text reads best on this color (12.01:1).
About this color
#63D4DF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.103 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.034 away. Black text reads best on it, at 12.01:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.01:1 |
| White text | 1.74:1 |
Values
| HEX | #63D4DF |
| RGB | rgb(99, 212, 223) |
| HSL | hsl(185, 66%, 63%) |
| OKLCH | oklch(80.9% 0.103 203.9) |
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 #63D4DF | 1.74:1 | Fails | Lc -35.5 | Non-text elements, placeholder text |
| Black text on #63D4DF | 12.01:1 | AAA | Lc 72.2 | Content text, not long reading |
| #63D4DF text on white | 1.74:1 | Fails | Lc 31.6 | Non-text elements, placeholder text |
| #63D4DF text on black | 12.01:1 | AAA | Lc -71.1 | 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
#EBF8FA
oklch(97% 0.014 207.9)
-
Step 100
100
#D4F0F3
oklch(93.6% 0.03 204.5)
-
Step 200
200
#ADE5EB
oklch(88.6% 0.058 204.4)
-
Step 300
300 (this color)
#63D4DF
oklch(80.9% 0.103 203.9)
-
Step 400
400
#00B6C3
oklch(70.8% 0.121 203.9)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#63D4DF 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) | #C5CCE0 | 0.103 |
| Deuteranopia (no green cones) | #B2BEE0 | 0.095 |
| Tritanopia (no blue cones) | #00DBD7 | 0.042 |
| Achromatopsia (no color) | #C4C4C4 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63D4DF
#63D4DF
oklch(80.9% 0.103 203.9)
- #FCA6A0
#FCA6A0
oklch(80.8% 0.103 24)
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 #63D4DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.034
- Medium Turquoise #48D1CC ΔE 0.035
- Sky Blue #87CEEB ΔE 0.041
- Vivid Sky Blue #4CC9F0 ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.048
- Turquoise #40E0D0 ΔE 0.049
- Seafoam Blue #78D1B6 ΔE 0.056
- Lightblue #7BC8F6 ΔE 0.057
Use #63D4DF 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.