#63B3BE
Closest named color: Turquoise Blue (#06B1C4). oklch(72% 0.08 207.1), rgb(99, 179, 190).
Aa
Black text reads best on this color (8.72:1).
About this color
#63B3BE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.080 and its hue 207°. 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 8.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.72:1 |
| White text | 2.40:1 |
Values
| HEX | #63B3BE |
| RGB | rgb(99, 179, 190) |
| HSL | hsl(187, 41%, 57%) |
| OKLCH | oklch(72% 0.08 207.1) |
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 #63B3BE | 2.40:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #63B3BE | 8.72:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #63B3BE text on white | 2.40:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #63B3BE text on black | 8.72:1 | 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
#C5DFE2
oklch(88.5% 0.028 205.1)
-
Step 300
300
#9BCAD1
oklch(80.8% 0.05 207.5)
-
Step 400
400 (this color)
#63B3BE
oklch(72% 0.08 207.1)
-
Step 500
500
#1E9AA9
oklch(63% 0.102 207.7)
-
Step 600
600
#008390
oklch(55.7% 0.096 207)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#052C31
oklch(27% 0.042 207.6)
#63B3BE 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) | #A7ADBF | 0.078 |
| Deuteranopia (no green cones) | #99A2BE | 0.073 |
| Tritanopia (no blue cones) | #30B9B6 | 0.040 |
| Achromatopsia (no color) | #A7A7A7 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B3BE
#63B3BE
oklch(72% 0.08 207.1)
- #D29189
#D29189
oklch(71.9% 0.08 27)
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 #63B3BE, 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 0.054
- Topaz #13BBAF ΔE 0.055
- Bluey Grey #89A0B0 ΔE 0.060
- Cool Steel #97A7B3 ΔE 0.061
- Pewter #96A8A1 ΔE 0.064
Use #63B3BE 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.