#63B9BE
Closest named color: Topaz (#13BBAF). oklch(73.4% 0.083 200.4), rgb(99, 185, 190).
Aa
Black text reads best on this color (9.21:1).
About this color
#63B9BE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.083 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.050 away. Black text reads best on it, at 9.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.21:1 |
| White text | 2.27:1 |
Values
| HEX | #63B9BE |
| RGB | rgb(99, 185, 190) |
| HSL | hsl(183, 41%, 57%) |
| OKLCH | oklch(73.4% 0.083 200.4) |
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 #63B9BE | 2.27:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #63B9BE | 9.21:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #63B9BE text on white | 2.27:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #63B9BE text on black | 9.21:1 | AAA | Lc -57.3 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DFEDEE
oklch(93.6% 0.015 202)
-
Step 200
200
#C4DFE1
oklch(88.4% 0.029 202.1)
-
Step 300
300
#99CBCE
oklch(80.8% 0.052 200.8)
-
Step 400
400 (this color)
#63B9BE
oklch(73.4% 0.083 200.4)
-
Step 500
500
#049CA3
oklch(63% 0.107 200.5)
-
Step 600
600
#008389
oklch(55.5% 0.094 200.5)
-
Step 700
700
#006F74
oklch(49.2% 0.084 200.3)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#022D2F
oklch(27.1% 0.045 199.6)
#63B9BE 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) | #AEB2BE | 0.085 |
| Deuteranopia (no green cones) | #9FA7BF | 0.079 |
| Tritanopia (no blue cones) | #2EBEBA | 0.036 |
| Achromatopsia (no color) | #ACACAC | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B9BE
#63B9BE
oklch(73.4% 0.083 200.4)
- #D99493
#D99493
oklch(73.4% 0.084 20.2)
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 #63B9BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.054
- Light Sea Green #20B2AA ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.062
- Bluegrey #85A3B2 ΔE 0.064
- Medium Turquoise #48D1CC ΔE 0.064
- Greyblue #77A1B5 ΔE 0.066
- Muted Teal #90B494 ΔE 0.067
Use #63B9BE 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.