#63CBBA
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.5% 0.1 181.5), rgb(99, 203, 186).
Aa
Black text reads best on this color (10.78:1).
About this color
#63CBBA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.100 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.025 away. Black text reads best on it, at 10.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.78:1 |
| White text | 1.94:1 |
Values
| HEX | #63CBBA |
| RGB | rgb(99, 203, 186) |
| HSL | hsl(170, 50%, 59%) |
| OKLCH | oklch(77.5% 0.1 181.5) |
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 #63CBBA | 1.94:1 | Fails | Lc -41.6 | Non-text elements, placeholder text |
| Black text on #63CBBA | 10.78:1 | AAA | Lc 66.7 | Content text, not long reading |
| #63CBBA text on white | 1.94:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #63CBBA text on black | 10.78:1 | AAA | Lc -65.2 | 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
#ECF9F6
oklch(97.2% 0.014 180.7)
-
Step 100
100
#D6F1EB
oklch(93.7% 0.029 180.8)
-
Step 200
200
#B1E6DB
oklch(88.5% 0.056 180.8)
-
Step 300
300 (this color)
#63CBBA
oklch(77.5% 0.1 181.5)
-
Step 400
400
#00BAA6
oklch(70.8% 0.127 181.5)
-
Step 500
500
#009F8E
oklch(63% 0.113 181.8)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#63CBBA 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) | #C3C1B9 | 0.106 |
| Deuteranopia (no green cones) | #B2B5BC | 0.100 |
| Tritanopia (no blue cones) | #2ACEC6 | 0.031 |
| Achromatopsia (no color) | #BABABA | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CBBA
#63CBBA
oklch(77.5% 0.1 181.5)
- #EC9BB1
#EC9BB1
oklch(77.6% 0.1 2)
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 #63CBBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.025
- Medium Turquoise #48D1CC ΔE 0.027
- Seafoam Blue #78D1B6 ΔE 0.027
- Pale Teal #82CBB2 ΔE 0.028
- Dark Turquoise #00CED1 ΔE 0.044
- Tiffany Blue #94D2BD ΔE 0.053
- Turquoise #40E0D0 ΔE 0.056
- Dark Sea Green #8FBC8F ΔE 0.065
Use #63CBBA 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.