#478BE4
Closest named color: Dark Sky Blue (#448EE4). oklch(63.5% 0.151 256.1), rgb(71, 139, 228).
Aa
Black text reads best on this color (6.08:1).
About this color
#478BE4 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.151 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.008 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #478BE4 |
| RGB | rgb(71, 139, 228) |
| HSL | hsl(214, 74%, 59%) |
| OKLCH | oklch(63.5% 0.151 256.1) |
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 #478BE4 | 3.45:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #478BE4 | 6.08:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #478BE4 text on white | 3.45:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #478BE4 text on black | 6.08:1 | AA | Lc -39.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6EA3E9
oklch(70.7% 0.118 255.8)
-
Step 500
500 (this color)
#478BE4
oklch(63.5% 0.151 256.1)
-
Step 600
600
#2472D1
oklch(55.7% 0.164 256)
-
Step 700
700
#165FB5
oklch(49.2% 0.153 256)
-
Step 800
800
#164E92
oklch(42.8% 0.126 255.9)
-
Step 900
900
#194175
oklch(37.7% 0.1 256.3)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#478BE4 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) | #6292E8 | 0.035 |
| Deuteranopia (no green cones) | #4A83E2 | 0.021 |
| Tritanopia (no blue cones) | #00A0AC | 0.120 |
| Achromatopsia (no color) | #8A8A8A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #478BE4
#478BE4
oklch(63.5% 0.151 256.1)
- #B87D00
#B87D00
oklch(63.4% 0.133 75.8)
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 #478BE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.008
- Chefchaouen Blue #4895EF ΔE 0.029
- Soft Blue #6488EA ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.043
- Water Blue #0E87CC ΔE 0.051
- Cornflower #6A79F7 ΔE 0.065
- Cool Blue #4984B8 ΔE 0.066
Use #478BE4 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.