#63A8DB
Closest named color: Greyblue (#77A1B5). oklch(70.6% 0.103 242.2), rgb(99, 168, 219).
Aa
Black text reads best on this color (8.15:1).
About this color
#63A8DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.103 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.055 away. Black text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.15:1 |
| White text | 2.57:1 |
Values
| HEX | #63A8DB |
| RGB | rgb(99, 168, 219) |
| HSL | hsl(206, 62%, 62%) |
| OKLCH | oklch(70.6% 0.103 242.2) |
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 #63A8DB | 2.57:1 | Fails | Lc -55.3 | Large or bold text, headings |
| Black text on #63A8DB | 8.15:1 | AAA | Lc 53.8 | Large or bold text, headings |
| #63A8DB text on white | 2.57:1 | Fails | Lc 50.2 | Large or bold text, headings |
| #63A8DB text on black | 8.15:1 | AAA | Lc -51.7 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9DC6E7
oklch(80.8% 0.064 242.9)
-
Step 400
400 (this color)
#63A8DB
oklch(70.6% 0.103 242.2)
-
Step 500
500
#2E91D1
oklch(63% 0.131 242.1)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#07466B
oklch(37.8% 0.086 242.1)
-
Step 950
950
#09293E
oklch(27% 0.054 241.8)
#63A8DB 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) | #92A8DD | 0.053 |
| Deuteranopia (no green cones) | #819CDA | 0.043 |
| Tritanopia (no blue cones) | #00B5B9 | 0.086 |
| Achromatopsia (no color) | #A1A1A1 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A8DB
#63A8DB
oklch(70.6% 0.103 242.2)
- #CE925A
#CE925A
oklch(70.7% 0.103 62.9)
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 #63A8DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.067
- Bluey Grey #89A0B0 ΔE 0.069
- Chefchaouen Blue #4895EF ΔE 0.072
- Deep Sky Blue #00BFFF ΔE 0.074
- Cool Gray #8D99AE ΔE 0.076
Use #63A8DB 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.