#63CBB0
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.2% 0.105 174.1), rgb(99, 203, 176).
Aa
Black text reads best on this color (10.69:1).
About this color
#63CBB0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.105 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.012 away. Black text reads best on it, at 10.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.69:1 |
| White text | 1.96:1 |
Values
| HEX | #63CBB0 |
| RGB | rgb(99, 203, 176) |
| HSL | hsl(164, 50%, 59%) |
| OKLCH | oklch(77.2% 0.105 174.1) |
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 #63CBB0 | 1.96:1 | Fails | Lc -42.0 | Non-text elements, placeholder text |
| Black text on #63CBB0 | 10.69:1 | AAA | Lc 66.3 | Content text, not long reading |
| #63CBB0 text on white | 1.96:1 | Fails | Lc 37.6 | Non-text elements, placeholder text |
| #63CBB0 text on black | 10.69:1 | AAA | Lc -64.8 | 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
#ECF9F5
oklch(97.1% 0.015 175.7)
-
Step 100
100
#D6F1E8
oklch(93.6% 0.031 173.6)
-
Step 200
200
#B2E6D6
oklch(88.4% 0.058 174.1)
-
Step 300
300 (this color)
#63CBB0
oklch(77.2% 0.105 174.1)
-
Step 400
400
#00BB9A
oklch(70.7% 0.134 174)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#63CBB0 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) | #C5C0AF | 0.110 |
| Deuteranopia (no green cones) | #B5B4B2 | 0.105 |
| Tritanopia (no blue cones) | #33CDC3 | 0.033 |
| Achromatopsia (no color) | #B9B9B9 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63CBB0
#63CBB0
oklch(77.2% 0.105 174.1)
- #EA99B9
#EA99B9
oklch(77.3% 0.104 354.5)
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 #63CBB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.012
- Seafoam Blue #78D1B6 ΔE 0.027
- Pale Teal #82CBB2 ΔE 0.028
- Medium Turquoise #48D1CC ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.053
- Tiffany Blue #94D2BD ΔE 0.056
- Emerald #06D6A0 ΔE 0.057
- Dark Sea Green #8FBC8F ΔE 0.057
Use #63CBB0 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.