#63B1BC
Closest named color: Turquoise Blue (#06B1C4). oklch(71.4% 0.079 207.3), rgb(99, 177, 188).
Aa
Black text reads best on this color (8.54:1).
About this color
#63B1BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.079 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.045 away. Black text reads best on it, at 8.54:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.54:1 |
| White text | 2.45:1 |
Values
| HEX | #63B1BC |
| RGB | rgb(99, 177, 188) |
| HSL | hsl(187, 40%, 56%) |
| OKLCH | oklch(71.4% 0.079 207.3) |
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 #63B1BC | 2.45:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #63B1BC | 8.54:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #63B1BC text on white | 2.45:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #63B1BC text on black | 8.54:1 | AAA | Lc -53.8 | 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
#E0EDEF
oklch(93.7% 0.014 207.9)
-
Step 200
200
#C5DFE2
oklch(88.5% 0.028 205.1)
-
Step 300
300
#9CCAD1
oklch(80.9% 0.049 207.7)
-
Step 400
400 (this color)
#63B1BC
oklch(71.4% 0.079 207.3)
-
Step 500
500
#239AA8
oklch(63% 0.1 207.1)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
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
#062C31
oklch(27% 0.042 207.9)
#63B1BC 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) | #A5ABBD | 0.076 |
| Deuteranopia (no green cones) | #97A1BC | 0.070 |
| Tritanopia (no blue cones) | #33B7B4 | 0.039 |
| Achromatopsia (no color) | #A5A5A5 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B1BC
#63B1BC
oklch(71.4% 0.079 207.3)
- #D09088
#D09088
oklch(71.4% 0.079 27.1)
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 #63B1BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.045
- Greyblue #77A1B5 ΔE 0.045
- Bluegrey #85A3B2 ΔE 0.047
- Light Sea Green #20B2AA ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.056
- Topaz #13BBAF ΔE 0.056
- Cool Steel #97A7B3 ΔE 0.059
- Cadet Blue #5F9EA0 ΔE 0.059
Use #63B1BC 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.