#63A4AC
Closest named color: Cadet Blue (#5F9EA0). oklch(67.8% 0.067 205.7), rgb(99, 164, 172).
Aa
Black text reads best on this color (7.43:1).
About this color
#63A4AC is a medium-light, muted teal or cyan. In OKLCH its lightness is 68%, its chroma 0.067 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.022 away. Black text reads best on it, at 7.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #63A4AC |
| RGB | rgb(99, 164, 172) |
| HSL | hsl(187, 31%, 53%) |
| OKLCH | oklch(67.8% 0.067 205.7) |
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 #63A4AC | 2.82:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #63A4AC | 7.43:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #63A4AC text on white | 2.82:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #63A4AC text on black | 7.43:1 | AAA | Lc -47.7 | 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
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A2C9CE
oklch(80.9% 0.042 206)
-
Step 400
400 (this color)
#63A4AC
oklch(67.8% 0.067 205.7)
-
Step 500
500
#3E98A3
oklch(63% 0.086 206.3)
-
Step 600
600
#07838E
oklch(55.7% 0.094 205.3)
-
Step 700
700
#006E78
oklch(49.1% 0.084 205.8)
-
Step 800
800
#035A62
oklch(42.7% 0.072 205.4)
-
Step 900
900
#134A50
oklch(37.7% 0.056 205.6)
-
Step 950
950
#0E2B2F
oklch(26.9% 0.035 207.5)
#63A4AC 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) | #9A9FAD | 0.066 |
| Deuteranopia (no green cones) | #8E96AC | 0.061 |
| Tritanopia (no blue cones) | #42A9A6 | 0.033 |
| Achromatopsia (no color) | #9A9A9A | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4AC
#63A4AC
oklch(67.8% 0.067 205.7)
- #BE8882
#BE8882
oklch(67.8% 0.067 26.1)
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 #63A4AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.022
- Greyblue #77A1B5 ΔE 0.029
- Bluegrey #85A3B2 ΔE 0.040
- Dull Teal #5F9E8F ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.045
- Grey Teal #5E9B8A ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.055
Use #63A4AC 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.