#63BBB0
Closest named color: Topaz (#13BBAF). oklch(73.4% 0.087 185), rgb(99, 187, 176).
Aa
Black text reads best on this color (9.26:1).
About this color
#63BBB0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.087 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.041 away. Black text reads best on it, at 9.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.26:1 |
| White text | 2.26:1 |
Values
| HEX | #63BBB0 |
| RGB | rgb(99, 187, 176) |
| HSL | hsl(173, 39%, 56%) |
| OKLCH | oklch(73.4% 0.087 185) |
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 #63BBB0 | 2.26:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #63BBB0 | 9.26:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #63BBB0 text on white | 2.26:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #63BBB0 text on black | 9.26:1 | 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
#F0F7F6
oklch(97.1% 0.008 186.9)
-
Step 100
100
#DFEDEB
oklch(93.5% 0.015 186.7)
-
Step 200
200
#C4E0DC
oklch(88.5% 0.03 186.2)
-
Step 300
300
#99CDC5
oklch(81% 0.055 184.5)
-
Step 400
400 (this color)
#63BBB0
oklch(73.4% 0.087 185)
-
Step 500
500
#019F92
oklch(63.2% 0.111 184.7)
-
Step 600
600
#00857B
oklch(55.5% 0.097 185.6)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#022E29
oklch(27.1% 0.047 183.4)
#63BBB0 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) | #B3B3B0 | 0.092 |
| Deuteranopia (no green cones) | #A5A8B1 | 0.087 |
| Tritanopia (no blue cones) | #39BEB7 | 0.027 |
| Achromatopsia (no color) | #ACACAC | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BBB0
#63BBB0
oklch(73.4% 0.087 185)
- #D892A2
#D892A2
oklch(73.4% 0.087 4.5)
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 #63BBB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.041
- Light Sea Green #20B2AA ΔE 0.051
- Greeny Blue #42B395 ΔE 0.052
- Muted Teal #90B494 ΔE 0.053
- Medium Aquamarine #66CDAA ΔE 0.056
- Pale Teal #82CBB2 ΔE 0.057
- Dark Sea Green #8FBC8F ΔE 0.060
- Medium Turquoise #48D1CC ΔE 0.061
Use #63BBB0 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.