#63DDE5
Closest named color: Aqua Blue (#02D8E9). oklch(83.1% 0.109 201.2), rgb(99, 221, 229).
Aa
Black text reads best on this color (13.00:1).
About this color
#63DDE5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.109 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.040 away. Black text reads best on it, at 13.00:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 13.00:1 |
| White text | 1.61:1 |
Values
| HEX | #63DDE5 |
| RGB | rgb(99, 221, 229) |
| HSL | hsl(184, 71%, 64%) |
| OKLCH | oklch(83.1% 0.109 201.2) |
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 #63DDE5 | 1.61:1 | Fails | Lc -30.8 | Non-text elements, placeholder text |
| Black text on #63DDE5 | 13.00:1 | AAA | Lc 76.5 | Fine for body text |
| #63DDE5 text on white | 1.61:1 | Fails | Lc 27.3 | Dividers and decoration only |
| #63DDE5 text on black | 13.00:1 | AAA | Lc -75.6 | 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
#EBF9F9
oklch(97.2% 0.015 196.9)
-
Step 100
100
#D3F1F3
oklch(93.7% 0.031 201.5)
-
Step 200
200
#AAE6EA
oklch(88.6% 0.061 201.3)
-
Step 300
300 (this color)
#63DDE5
oklch(83.1% 0.109 201.2)
-
Step 400
400
#00B6BF
oklch(70.6% 0.12 201.1)
-
Step 500
500
#009CA4
oklch(63% 0.107 201.2)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#63DDE5 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) | #CED4E6 | 0.110 |
| Deuteranopia (no green cones) | #BAC5E6 | 0.103 |
| Tritanopia (no blue cones) | #00E4DF | 0.039 |
| Achromatopsia (no color) | #CBCBCB | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63DDE5
#63DDE5
oklch(83.1% 0.109 201.2)
- #FFB0AD
#FFB0AD
oklch(83.2% 0.093 21.7)
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 #63DDE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.040
- Turquoise #40E0D0 ΔE 0.041
- Medium Turquoise #48D1CC ΔE 0.049
- Robin's Egg #6DEDFD ΔE 0.050
- Sky Blue #87CEEB ΔE 0.051
- Tiffany Blue #94D2BD ΔE 0.061
- Celeste #A8DADC ΔE 0.062
- Seafoam Blue #78D1B6 ΔE 0.063
Use #63DDE5 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.