#63AEB3
Closest named color: Greyblue (#77A1B5). oklch(70.4% 0.075 201.2), rgb(99, 174, 179).
Aa
Black text reads best on this color (8.23:1).
About this color
#63AEB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.075 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.041 away. Black text reads best on it, at 8.23:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.23:1 |
| White text | 2.54:1 |
Values
| HEX | #63AEB3 |
| RGB | rgb(99, 174, 179) |
| HSL | hsl(184, 34%, 55%) |
| OKLCH | oklch(70.4% 0.075 201.2) |
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 #63AEB3 | 2.54:1 | Fails | Lc -54.9 | Large or bold text, headings |
| Black text on #63AEB3 | 8.23:1 | AAA | Lc 54.2 | Large or bold text, headings |
| #63AEB3 text on white | 2.54:1 | Fails | Lc 49.8 | Large or bold text, headings |
| #63AEB3 text on black | 8.23:1 | AAA | Lc -52.1 | 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
#E0EDED
oklch(93.6% 0.014 196.9)
-
Step 200
200
#C6DFE0
oklch(88.6% 0.027 199.6)
-
Step 300
300
#9ECACD
oklch(80.9% 0.046 201.5)
-
Step 400
400 (this color)
#63AEB3
oklch(70.4% 0.075 201.2)
-
Step 500
500
#2C9BA1
oklch(63.2% 0.096 200.4)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#044B4F
oklch(37.6% 0.062 201.1)
-
Step 950
950
#082C2E
oklch(26.9% 0.04 200.4)
#63AEB3 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) | #A4A8B3 | 0.076 |
| Deuteranopia (no green cones) | #979EB3 | 0.071 |
| Tritanopia (no blue cones) | #3BB3AF | 0.033 |
| Achromatopsia (no color) | #A2A2A2 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AEB3
#63AEB3
oklch(70.4% 0.075 201.2)
- #CA8D8B
#CA8D8B
oklch(70.3% 0.075 21.2)
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 #63AEB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.041
- Bluegrey #85A3B2 ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.046
- Cadet Blue #5F9EA0 ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.053
- Topaz #13BBAF ΔE 0.054
- Pewter #96A8A1 ΔE 0.058
Use #63AEB3 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.