#63CFAB
Closest named color: Medium Aquamarine (#66CDAA). oklch(78.1% 0.114 169), rgb(99, 207, 171).
Aa
Black text reads best on this color (11.04:1).
About this color
#63CFAB is a light, moderately saturated green. In OKLCH its lightness is 78%, its chroma 0.114 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.005 away. Black text reads best on it, at 11.04:1.
| Hue family | Greens |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 11.04:1 |
| White text | 1.90:1 |
Values
| HEX | #63CFAB |
| RGB | rgb(99, 207, 171) |
| HSL | hsl(160, 53%, 60%) |
| OKLCH | oklch(78.1% 0.114 169) |
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 #63CFAB | 1.90:1 | Fails | Lc -40.3 | Non-text elements, placeholder text |
| Black text on #63CFAB | 11.04:1 | AAA | Lc 67.9 | Content text, not long reading |
| #63CFAB text on white | 1.90:1 | Fails | Lc 36.0 | Non-text elements, placeholder text |
| #63CFAB text on black | 11.04:1 | AAA | Lc -66.5 | 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
#ECF9F4
oklch(97.1% 0.015 171.1)
-
Step 100
100
#D6F1E6
oklch(93.5% 0.032 169.2)
-
Step 200
200
#B1E7D2
oklch(88.5% 0.062 169)
-
Step 300
300 (this color)
#63CFAB
oklch(78.1% 0.114 169)
-
Step 400
400
#00BC91
oklch(70.7% 0.142 168.9)
-
Step 500
500
#00A17C
oklch(63% 0.126 169.1)
-
Step 600
600
#008868
oklch(55.7% 0.112 168.9)
-
Step 700
700
#007257
oklch(49.1% 0.098 169.1)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3B
oklch(37.7% 0.075 169.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#63CFAB 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) | #CAC3A9 | 0.115 |
| Deuteranopia (no green cones) | #BAB7AD | 0.111 |
| Tritanopia (no blue cones) | #35D0C5 | 0.040 |
| Achromatopsia (no color) | #BCBCBC | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CFAB
#63CFAB
oklch(78.1% 0.114 169)
- #EE99C3
#EE99C3
oklch(78% 0.114 349)
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 #63CFAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.005
- Seafoam Blue #78D1B6 ΔE 0.026
- Pale Teal #82CBB2 ΔE 0.032
- Medium Turquoise #48D1CC ΔE 0.046
- Emerald #06D6A0 ΔE 0.046
- Tiffany Blue #94D2BD ΔE 0.056
- Turquoise #40E0D0 ΔE 0.057
- Dark Sea Green #8FBC8F ΔE 0.060
Use #63CFAB 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.