#63B5BC
Closest named color: Turquoise Blue (#06B1C4). oklch(72.4% 0.081 202.7), rgb(99, 181, 188).
Aa
Black text reads best on this color (8.86:1).
About this color
#63B5BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.081 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.048 away. Black text reads best on it, at 8.86:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.86:1 |
| White text | 2.36:1 |
Values
| HEX | #63B5BC |
| RGB | rgb(99, 181, 188) |
| HSL | hsl(185, 40%, 56%) |
| OKLCH | oklch(72.4% 0.081 202.7) |
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 #63B5BC | 2.36:1 | Fails | Lc -51.5 | Large or bold text, headings |
| Black text on #63B5BC | 8.86:1 | AAA | Lc 57.5 | Large or bold text, headings |
| #63B5BC text on white | 2.36:1 | Fails | Lc 46.5 | Large or bold text, headings |
| #63B5BC text on black | 8.86:1 | AAA | Lc -55.5 | 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
#C5DFE1
oklch(88.5% 0.028 202.3)
-
Step 300
300
#9BCBCF
oklch(81% 0.05 202.6)
-
Step 400
400 (this color)
#63B5BC
oklch(72.4% 0.081 202.7)
-
Step 500
500
#189BA5
oklch(63% 0.103 203.3)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#042C30
oklch(26.9% 0.043 205)
#63B5BC 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) | #AAAFBD | 0.081 |
| Deuteranopia (no green cones) | #9BA4BC | 0.074 |
| Tritanopia (no blue cones) | #31BBB7 | 0.037 |
| Achromatopsia (no color) | #A8A8A8 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B5BC
#63B5BC
oklch(72.4% 0.081 202.7)
- #D4928E
#D4928E
oklch(72.4% 0.081 23.1)
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 #63B5BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.048
- Topaz #13BBAF ΔE 0.051
- Light Sea Green #20B2AA ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.055
- Greyblue #77A1B5 ΔE 0.055
- Cool Steel #97A7B3 ΔE 0.063
- Pewter #96A8A1 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.064
Use #63B5BC 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.