#478EE4
Closest named color: Dark Sky Blue (#448EE4). oklch(64.2% 0.148 254.7), rgb(71, 142, 228).
Aa
Black text reads best on this color (6.25:1).
About this color
#478EE4 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.148 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.002 away. Black text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.25:1 |
| White text | 3.35:1 |
Values
| HEX | #478EE4 |
| RGB | rgb(71, 142, 228) |
| HSL | hsl(213, 74%, 59%) |
| OKLCH | oklch(64.2% 0.148 254.7) |
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 #478EE4 | 3.35:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #478EE4 | 6.25:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #478EE4 text on white | 3.35:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #478EE4 text on black | 6.25:1 | AA | Lc -41.0 | 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
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C4EF
oklch(81% 0.072 253.8)
-
Step 400
400
#6DA3E7
oklch(70.6% 0.116 254.8)
-
Step 500
500 (this color)
#478EE4
oklch(64.2% 0.148 254.7)
-
Step 600
600
#2073CE
oklch(55.6% 0.16 254.4)
-
Step 700
700
#1160B3
oklch(49.2% 0.15 254.6)
-
Step 800
800
#134E91
oklch(42.6% 0.125 255)
-
Step 900
900
#184273
oklch(37.7% 0.096 254.4)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#478EE4 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) | #6794E7 | 0.037 |
| Deuteranopia (no green cones) | #4F85E2 | 0.024 |
| Tritanopia (no blue cones) | #00A2AE | 0.116 |
| Achromatopsia (no color) | #8C8C8C | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #478EE4
#478EE4
oklch(64.2% 0.148 254.7)
- #BC7E00
#BC7E00
oklch(64.1% 0.135 74.5)
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 #478EE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.002
- Chefchaouen Blue #4895EF ΔE 0.023
- Soft Blue #6488EA ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.044
- Water Blue #0E87CC ΔE 0.053
- Faded Blue #658CBB ΔE 0.065
- Cool Blue #4984B8 ΔE 0.067
Use #478EE4 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.