#63DFFF
Closest named color: Robin's Egg (#6DEDFD). oklch(84.6% 0.118 217.6), rgb(99, 223, 255).
Aa
Black text reads best on this color (13.52:1).
About this color
#63DFFF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.118 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.041 away. Black text reads best on it, at 13.52:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 13.52:1 |
| White text | 1.55:1 |
Values
| HEX | #63DFFF |
| RGB | rgb(99, 223, 255) |
| HSL | hsl(192, 100%, 69%) |
| OKLCH | oklch(84.6% 0.118 217.6) |
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 #63DFFF | 1.55:1 | Fails | Lc -28.4 | Dividers and decoration only |
| Black text on #63DFFF | 13.52:1 | AAA | Lc 78.7 | Fine for body text |
| #63DFFF text on white | 1.55:1 | Fails | Lc 25.1 | Dividers and decoration only |
| #63DFFF text on black | 13.52:1 | AAA | Lc -78.0 | Fine for body text |
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
#EAF8FD
oklch(97% 0.016 221.1)
-
Step 100
100
#D2F0F9
oklch(93.6% 0.034 217.7)
-
Step 200
200
#A8E4F6
oklch(88.4% 0.066 218.3)
-
Step 300
300 (this color)
#63DFFF
oklch(84.6% 0.118 217.6)
-
Step 400
400
#00B3D4
oklch(70.7% 0.127 217.3)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#63DFFF 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) | #CAD9FF | 0.102 |
| Deuteranopia (no green cones) | #B3C8FF | 0.092 |
| Tritanopia (no blue cones) | #00EAE9 | 0.059 |
| Achromatopsia (no color) | #CFCFCF | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63DFFF
#63DFFF
oklch(84.6% 0.118 217.6)
- #FFB9A4
#FFB9A4
oklch(84.6% 0.087 37.4)
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 #63DFFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.041
- Light Sky Blue #87CEFA ΔE 0.049
- Sky Blue #87CEEB ΔE 0.049
- Aqua Blue #02D8E9 ΔE 0.053
- Sky #82CAFC ΔE 0.058
- Lightblue #7BC8F6 ΔE 0.060
- Robin Egg Blue #8AF1FE ΔE 0.062
- Vivid Sky Blue #4CC9F0 ΔE 0.064
Use #63DFFF 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.