#4478BD
Closest named color: Windows Blue (#3778BF). oklch(56.9% 0.121 256.1), rgb(68, 120, 189).
Aa
Black text reads best on this color (4.66:1).
About this color
#4478BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.121 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.011 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #4478BD |
| RGB | rgb(68, 120, 189) |
| HSL | hsl(214, 48%, 50%) |
| OKLCH | oklch(56.9% 0.121 256.1) |
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 #4478BD | 4.49:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #4478BD | 4.66:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #4478BD text on white | 4.49:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #4478BD text on black | 4.66:1 | AA | Lc -30.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAED
oklch(88.4% 0.03 256)
-
Step 300
300
#AAC3E4
oklch(81% 0.054 255.4)
-
Step 400
400
#7DA3D7
oklch(70.8% 0.087 256.4)
-
Step 500
500
#5B8BCC
oklch(63.1% 0.112 256.3)
-
Step 600
600 (this color)
#4478BD
oklch(56.9% 0.121 256.1)
-
Step 700
700
#32619F
oklch(49.1% 0.112 256.1)
-
Step 800
800
#2A4F81
oklch(42.6% 0.094 256.5)
-
Step 900
900
#264268
oklch(37.6% 0.074 256.4)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#4478BD 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) | #5A7DC0 | 0.029 |
| Deuteranopia (no green cones) | #4971BC | 0.019 |
| Tritanopia (no blue cones) | #008891 | 0.100 |
| Achromatopsia (no color) | #777777 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4478BD
#4478BD
oklch(56.9% 0.121 256.1)
- #9F6C00
#9F6C00
oklch(57% 0.12 76.2)
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 #4478BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.011
- Steel Blue #4682B4 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.035
- Cool Blue #4984B8 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.040
- French Blue #436BAD ΔE 0.040
- Water Blue #0E87CC ΔE 0.047
- Muted Blue #3B719F ΔE 0.050
Use #4478BD 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.