#63AACB
Closest named color: Greyblue (#77A1B5). oklch(70.4% 0.086 229.7), rgb(99, 170, 203).
Aa
Black text reads best on this color (8.14:1).
About this color
#63AACB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.086 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.037 away. Black text reads best on it, at 8.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.14:1 |
| White text | 2.57:1 |
Values
| HEX | #63AACB |
| RGB | rgb(99, 170, 203) |
| HSL | hsl(199, 50%, 59%) |
| OKLCH | oklch(70.4% 0.086 229.7) |
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 #63AACB | 2.57:1 | Fails | Lc -55.4 | Large or bold text, headings |
| Black text on #63AACB | 8.14:1 | AAA | Lc 53.7 | Large or bold text, headings |
| #63AACB text on white | 2.57:1 | Fails | Lc 50.3 | Large or bold text, headings |
| #63AACB text on black | 8.14:1 | AAA | Lc -51.6 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C6DDE9
oklch(88.4% 0.03 230.3)
-
Step 300
300
#9DC8DD
oklch(80.9% 0.054 229.3)
-
Step 400
400 (this color)
#63AACB
oklch(70.4% 0.086 229.7)
-
Step 500
500
#2E95BF
oklch(63% 0.11 230)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#064860
oklch(37.7% 0.072 229.7)
-
Step 950
950
#092A38
oklch(26.9% 0.045 230.2)
#63AACB 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) | #99A8CD | 0.061 |
| Deuteranopia (no green cones) | #8A9CCB | 0.055 |
| Tritanopia (no blue cones) | #26B3B5 | 0.062 |
| Achromatopsia (no color) | #A1A1A1 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AACB
#63AACB
oklch(70.4% 0.086 229.7)
- #CC906F
#CC906F
oklch(70.5% 0.086 49.7)
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 #63AACB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.037
- Bluegrey #85A3B2 ΔE 0.047
- Turquoise Blue #06B1C4 ΔE 0.050
- Bluey Grey #89A0B0 ΔE 0.053
- Cool Steel #97A7B3 ΔE 0.064
- Cool Gray #8D99AE ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.065
- Cool Grey #95A3A6 ΔE 0.071
Use #63AACB 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.