#63B3BC
Closest named color: Turquoise Blue (#06B1C4). oklch(71.9% 0.08 205), rgb(99, 179, 188).
Aa
Black text reads best on this color (8.70:1).
About this color
#63B3BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.080 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.046 away. Black text reads best on it, at 8.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.70:1 |
| White text | 2.41:1 |
Values
| HEX | #63B3BC |
| RGB | rgb(99, 179, 188) |
| HSL | hsl(186, 40%, 56%) |
| OKLCH | oklch(71.9% 0.08 205) |
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 #63B3BC | 2.41:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #63B3BC | 8.70:1 | AAA | Lc 56.6 | Large or bold text, headings |
| #63B3BC text on white | 2.41:1 | Fails | Lc 47.4 | Large or bold text, headings |
| #63B3BC text on black | 8.70:1 | AAA | Lc -54.7 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#DFEDEE
oklch(93.6% 0.015 202)
-
Step 200
200
#C5DFE2
oklch(88.5% 0.028 205.1)
-
Step 300
300
#9BCAD0
oklch(80.8% 0.05 205.9)
-
Step 400
400 (this color)
#63B3BC
oklch(71.9% 0.08 205)
-
Step 500
500
#1E9BA7
oklch(63.2% 0.102 205.1)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#052C30
oklch(26.9% 0.042 205.1)
#63B3BC 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) | #A8ADBD | 0.079 |
| Deuteranopia (no green cones) | #99A2BC | 0.073 |
| Tritanopia (no blue cones) | #32B9B6 | 0.038 |
| Achromatopsia (no color) | #A7A7A7 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B3BC
#63B3BC
oklch(71.9% 0.08 205)
- #D2918B
#D2918B
oklch(71.9% 0.08 25.1)
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 #63B3BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.051
- Light Sea Green #20B2AA ΔE 0.052
- Topaz #13BBAF ΔE 0.054
- Bluey Grey #89A0B0 ΔE 0.060
- Cool Steel #97A7B3 ΔE 0.061
- Pewter #96A8A1 ΔE 0.062
Use #63B3BC 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.