#5D78CF
Closest named color: Windows Blue (#3778BF). oklch(59.3% 0.137 269), rgb(93, 120, 207).
Aa
Black text reads best on this color (5.05:1).
About this color
#5D78CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.137 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.047 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #5D78CF |
| RGB | rgb(93, 120, 207) |
| HSL | hsl(226, 54%, 59%) |
| OKLCH | oklch(59.3% 0.137 269) |
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 #5D78CF | 4.15:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #5D78CF | 5.05:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #5D78CF text on white | 4.15:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #5D78CF text on black | 5.05:1 | AA | Lc -33.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0C0E9
oklch(80.9% 0.061 268.3)
-
Step 400
400
#879EDF
oklch(70.7% 0.099 268.9)
-
Step 500
500
#6A85D5
oklch(63.1% 0.125 268.6)
-
Step 600
600 (this color)
#5D78CF
oklch(59.3% 0.137 269)
-
Step 700
700
#435AA8
oklch(49% 0.128 269)
-
Step 800
800
#384A88
oklch(42.7% 0.105 269.4)
-
Step 900
900
#303E6D
oklch(37.6% 0.083 269.6)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#5D78CF 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) | #5382D2 | 0.027 |
| Deuteranopia (no green cones) | #4578CD | 0.026 |
| Tritanopia (no blue cones) | #1C8B99 | 0.123 |
| Achromatopsia (no color) | #7C7C7C | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5D78CF
#5D78CF
oklch(59.3% 0.137 269)
- #9B7900
#9B7900
oklch(59.2% 0.121 88.9)
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 #5D78CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.047
- Soft Blue #6488EA ΔE 0.056
- Cool Blue #4984B8 ΔE 0.057
- Steel Blue #4682B4 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.062
- Water Blue #0E87CC ΔE 0.063
- Cornflower #6A79F7 ΔE 0.063
Use #5D78CF 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.