#0478CA
Closest named color: Windows Blue (#3778BF). oklch(56.1% 0.154 249.1), rgb(4, 120, 202).
Aa
White text reads best on this color (4.62:1).
About this color
#0478CA is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.154 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.027 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.54:1 |
| White text | 4.62:1 |
Values
| HEX | #0478CA |
| RGB | rgb(4, 120, 202) |
| HSL | hsl(205, 96%, 40%) |
| OKLCH | oklch(56.1% 0.154 249.1) |
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 #0478CA | 4.62:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #0478CA | 4.54:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #0478CA text on white | 4.62:1 | AA | Lc 71.4 | Content text, not long reading |
| #0478CA text on black | 4.54:1 | AA | Lc -30.3 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5EC
oklch(80.9% 0.069 248.7)
-
Step 400
400
#67A6E3
oklch(70.8% 0.111 248.9)
-
Step 500
500
#388EDB
oklch(63.1% 0.142 249.1)
-
Step 600
600 (this color)
#0478CA
oklch(56.1% 0.154 249.1)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#104470
oklch(37.8% 0.092 248.9)
-
Step 950
950
#0C2842
oklch(27.1% 0.059 249.5)
#0478CA 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) | #4E7DCD | 0.048 |
| Deuteranopia (no green cones) | #2E6EC8 | 0.028 |
| Tritanopia (no blue cones) | #008C97 | 0.111 |
| Achromatopsia (no color) | #757575 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0478CA
#0478CA
oklch(56.1% 0.154 249.1)
- #A26500
#A26500
oklch(56.1% 0.122 69)
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 #0478CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.027
- Nice Blue #107AB0 ΔE 0.042
- Water Blue #0E87CC ΔE 0.043
- Mid Blue #276AB3 ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.055
- French Blue #436BAD ΔE 0.057
- Steel Blue #4682B4 ΔE 0.061
- Royal Blue #4169E1 ΔE 0.062
Use #0478CA 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.