#63A8DA
Closest named color: Greyblue (#77A1B5). oklch(70.6% 0.102 241.6), rgb(99, 168, 218).
Aa
Black text reads best on this color (8.14:1).
About this color
#63A8DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.102 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.054 away. Black text reads best on it, at 8.14:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.14:1 |
| White text | 2.57:1 |
Values
| HEX | #63A8DA |
| RGB | rgb(99, 168, 218) |
| HSL | hsl(205, 62%, 62%) |
| OKLCH | oklch(70.6% 0.102 241.6) |
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 #63A8DA | 2.57:1 | Fails | Lc -55.4 | Large or bold text, headings |
| Black text on #63A8DA | 8.14:1 | AAA | Lc 53.7 | Large or bold text, headings |
| #63A8DA text on white | 2.57:1 | Fails | Lc 50.3 | Large or bold text, headings |
| #63A8DA text on black | 8.14:1 | 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
#C6DDEF
oklch(88.6% 0.035 241.5)
-
Step 300
300
#9DC6E6
oklch(80.8% 0.063 242)
-
Step 400
400 (this color)
#63A8DA
oklch(70.6% 0.102 241.6)
-
Step 500
500
#2F91D0
oklch(63% 0.13 241.9)
-
Step 600
600
#007AB8
oklch(55.5% 0.131 241.7)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#07466A
oklch(37.7% 0.084 241.4)
-
Step 950
950
#09293E
oklch(27% 0.054 241.8)
#63A8DA 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) | #92A8DC | 0.053 |
| Deuteranopia (no green cones) | #829CD9 | 0.043 |
| Tritanopia (no blue cones) | #04B4B9 | 0.083 |
| Achromatopsia (no color) | #A1A1A1 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A8DA
#63A8DA
oklch(70.6% 0.102 241.6)
- #CE915C
#CE915C
oklch(70.5% 0.101 61)
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 #63A8DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.073
- Deep Sky Blue #00BFFF ΔE 0.075
- Cool Gray #8D99AE ΔE 0.075
Use #63A8DA 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.