#63B3BF
Closest named color: Turquoise Blue (#06B1C4). oklch(72% 0.08 208.1), rgb(99, 179, 191).
Aa
Black text reads best on this color (8.73:1).
About this color
#63B3BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.080 and its hue 208°. 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 8.73:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.73:1 |
| White text | 2.40:1 |
Values
| HEX | #63B3BF |
| RGB | rgb(99, 179, 191) |
| HSL | hsl(188, 42%, 57%) |
| OKLCH | oklch(72% 0.08 208.1) |
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 #63B3BF | 2.40:1 | Fails | Lc -52.2 | Large or bold text, headings |
| Black text on #63B3BF | 8.73:1 | AAA | Lc 56.8 | Large or bold text, headings |
| #63B3BF text on white | 2.40:1 | Fails | Lc 47.2 | Large or bold text, headings |
| #63B3BF text on black | 8.73:1 | AAA | Lc -54.8 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C5DFE3
oklch(88.6% 0.028 207.8)
-
Step 300
300
#9BCAD2
oklch(80.8% 0.05 209.1)
-
Step 400
400 (this color)
#63B3BF
oklch(72% 0.08 208.1)
-
Step 500
500
#1D9AAA
oklch(63% 0.103 208.5)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#052C31
oklch(27% 0.042 207.6)
#63B3BF 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) | #A7ADC0 | 0.078 |
| Deuteranopia (no green cones) | #98A2BF | 0.072 |
| Tritanopia (no blue cones) | #2FB9B6 | 0.041 |
| Achromatopsia (no color) | #A7A7A7 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B3BF
#63B3BF
oklch(72% 0.08 208.1)
- #D29289
#D29289
oklch(72.1% 0.079 28.1)
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 #63B3BF, 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 0.055
- Topaz #13BBAF ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.060
- Cool Steel #97A7B3 ΔE 0.061
- Pewter #96A8A1 ΔE 0.064
Use #63B3BF 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.