#63BCA4
Closest named color: Topaz (#13BBAF). oklch(73.3% 0.094 173.9), rgb(99, 188, 164).
Aa
Black text reads best on this color (9.25:1).
About this color
#63BCA4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.094 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.042 away. Black text reads best on it, at 9.25:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.25:1 |
| White text | 2.26:1 |
Values
| HEX | #63BCA4 |
| RGB | rgb(99, 188, 164) |
| HSL | hsl(164, 40%, 56%) |
| OKLCH | oklch(73.3% 0.094 173.9) |
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 #63BCA4 | 2.26:1 | Fails | Lc -49.4 | Large or bold text, headings |
| Black text on #63BCA4 | 9.25:1 | AAA | Lc 59.4 | Large or bold text, headings |
| #63BCA4 text on white | 2.26:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #63BCA4 text on black | 9.25:1 | AAA | Lc -57.6 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DFEEE9
oklch(93.7% 0.017 174)
-
Step 200
200
#C4E1D7
oklch(88.6% 0.034 172.7)
-
Step 300
300
#9ACDBE
oklch(80.8% 0.057 174.8)
-
Step 400
400 (this color)
#63BCA4
oklch(73.3% 0.094 173.9)
-
Step 500
500
#03A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725D
oklch(49.3% 0.094 174)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#022E25
oklch(27% 0.049 175.1)
#63BCA4 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) | #B7B2A3 | 0.098 |
| Deuteranopia (no green cones) | #A8A8A6 | 0.093 |
| Tritanopia (no blue cones) | #40BEB5 | 0.030 |
| Achromatopsia (no color) | #ACACAC | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BCA4
#63BCA4
oklch(73.3% 0.094 173.9)
- #D790AD
#D790AD
oklch(73.3% 0.093 353.5)
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 #63BCA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.042
- Greeny Blue #42B395 ΔE 0.042
- Muted Teal #90B494 ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.048
- Dark Sea Green #8FBC8F ΔE 0.049
- Light Sea Green #20B2AA ΔE 0.054
- Pale Teal #82CBB2 ΔE 0.056
- Sage Green #88B378 ΔE 0.060
Use #63BCA4 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.