#478DD3
Closest named color: Dark Sky Blue (#448EE4). oklch(63% 0.127 250.5), rgb(71, 141, 211).
Aa
Black text reads best on this color (6.01:1).
About this color
#478DD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.127 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.025 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.01:1 |
| White text | 3.48:1 |
Values
| HEX | #478DD3 |
| RGB | rgb(71, 141, 211) |
| HSL | hsl(210, 61%, 55%) |
| OKLCH | oklch(63% 0.127 250.5) |
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 #478DD3 | 3.48:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #478DD3 | 6.01:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #478DD3 text on white | 3.48:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #478DD3 text on black | 6.01:1 | AA | Lc -39.5 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DD
oklch(70.7% 0.1 250.7)
-
Step 500
500 (this color)
#478DD3
oklch(63% 0.127 250.5)
-
Step 600
600
#2576C1
oklch(55.6% 0.139 250.7)
-
Step 700
700
#1663A6
oklch(49.1% 0.128 250.3)
-
Step 800
800
#165187
oklch(42.7% 0.107 250.5)
-
Step 900
900
#1A436C
oklch(37.6% 0.084 251.1)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#478DD3 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) | #6E91D6 | 0.043 |
| Deuteranopia (no green cones) | #5B83D2 | 0.030 |
| Tritanopia (no blue cones) | #009DA6 | 0.098 |
| Achromatopsia (no color) | #898989 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #478DD3
#478DD3
oklch(63% 0.127 250.5)
- #B97A1B
#B97A1B
oklch(63% 0.128 70.8)
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 #478DD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.025
- Water Blue #0E87CC ΔE 0.039
- Cool Blue #4984B8 ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.044
- Faded Blue #658CBB ΔE 0.044
- Soft Blue #6488EA ΔE 0.049
- Steel Blue #4682B4 ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.053
Use #478DD3 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.