#4778BB
Closest named color: Windows Blue (#3778BF). oklch(56.9% 0.117 256.6), rgb(71, 120, 187).
Aa
Black text reads best on this color (4.67:1).
About this color
#4778BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.117 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.015 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #4778BB |
| RGB | rgb(71, 120, 187) |
| HSL | hsl(215, 46%, 51%) |
| OKLCH | oklch(56.9% 0.117 256.6) |
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 #4778BB | 4.49:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #4778BB | 4.67:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #4778BB text on white | 4.49:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #4778BB text on black | 4.67:1 | 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
#E3EAF4
oklch(93.5% 0.015 257.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E3
oklch(81% 0.052 255.7)
-
Step 400
400
#7EA3D5
oklch(70.7% 0.084 256.1)
-
Step 500
500
#5D8BCA
oklch(63.1% 0.108 256.5)
-
Step 600
600 (this color)
#4778BB
oklch(56.9% 0.117 256.6)
-
Step 700
700
#35619D
oklch(49.1% 0.108 256.7)
-
Step 800
800
#2C4F80
oklch(42.6% 0.091 257.1)
-
Step 900
900
#284266
oklch(37.6% 0.07 256.8)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#4778BB 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) | #5B7DBE | 0.028 |
| Deuteranopia (no green cones) | #4C72BA | 0.016 |
| Tritanopia (no blue cones) | #008791 | 0.097 |
| Achromatopsia (no color) | #777777 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4778BB
#4778BB
oklch(56.9% 0.117 256.6)
- #9E6C08
#9E6C08
oklch(56.9% 0.117 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 #4778BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.015
- Steel Blue #4682B4 ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.034
- Cool Blue #4984B8 ΔE 0.036
- French Blue #436BAD ΔE 0.040
- Nice Blue #107AB0 ΔE 0.040
- Dull Blue #49759C ΔE 0.048
- Off Blue #5684AE ΔE 0.048
Use #4778BB 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.