#5A78BE
Closest named color: Windows Blue (#3778BF). oklch(58.1% 0.114 265.5), rgb(90, 120, 190).
Aa
Black text reads best on this color (4.86:1).
About this color
#5A78BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.114 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.035 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #5A78BE |
| RGB | rgb(90, 120, 190) |
| HSL | hsl(222, 43%, 55%) |
| OKLCH | oklch(58.1% 0.114 265.5) |
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 #5A78BE | 4.31:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #5A78BE | 4.86:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #5A78BE text on white | 4.31:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #5A78BE text on black | 4.86:1 | AA | Lc -31.9 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C1E3
oklch(81% 0.051 265.3)
-
Step 400
400
#88A0D4
oklch(70.7% 0.081 265.2)
-
Step 500
500
#6B88C9
oklch(63.2% 0.104 265.2)
-
Step 600
600 (this color)
#5A78BE
oklch(58.1% 0.114 265.5)
-
Step 700
700
#435E9C
oklch(49.1% 0.105 265)
-
Step 800
800
#384D7F
oklch(42.8% 0.087 265.6)
-
Step 900
900
#304066
oklch(37.6% 0.069 265.9)
-
Step 950
950
#1C263C
oklch(27.1% 0.044 265)
#5A78BE 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) | #5C7FC1 | 0.020 |
| Deuteranopia (no green cones) | #5175BC | 0.015 |
| Tritanopia (no blue cones) | #298792 | 0.101 |
| Achromatopsia (no color) | #7A7A7A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A78BE
#5A78BE
oklch(58.1% 0.114 265.5)
- #997513
#997513
oklch(58.2% 0.114 85.8)
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 #5A78BE, closest first.
No curated palette has a color within ΔE 0.04 of #5A78BE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.035
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
- Off Blue #5684AE ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.051
- French Blue #436BAD ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.053
- Dull Blue #49759C ΔE 0.058
Use #5A78BE 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.