#5B79CF
Closest named color: Windows Blue (#3778BF). oklch(59.4% 0.136 267.7), rgb(91, 121, 207).
Aa
Black text reads best on this color (5.08:1).
About this color
#5B79CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.136 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.045 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.08:1 |
| White text | 4.13:1 |
Values
| HEX | #5B79CF |
| RGB | rgb(91, 121, 207) |
| HSL | hsl(224, 55%, 58%) |
| OKLCH | oklch(59.4% 0.136 267.7) |
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 #5B79CF | 4.13:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #5B79CF | 5.08:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #5B79CF text on white | 4.13:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #5B79CF text on black | 5.08:1 | AA | Lc -33.4 | 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 500.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#AEC0ED
oklch(81% 0.067 267.8)
-
Step 400
400
#849EE3
oklch(70.7% 0.106 267.9)
-
Step 500
500 (this color)
#5B79CF
oklch(59.4% 0.136 267.7)
-
Step 600
600
#4E6CC9
oklch(55.6% 0.148 267.9)
-
Step 700
700
#3F5AAE
oklch(49.1% 0.137 267.7)
-
Step 800
800
#344A8D
oklch(42.8% 0.114 267.7)
-
Step 900
900
#2D3E70
oklch(37.6% 0.088 267.9)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#5B79CF 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) | #5482D2 | 0.024 |
| Deuteranopia (no green cones) | #4678CD | 0.024 |
| Tritanopia (no blue cones) | #108C9A | 0.122 |
| Achromatopsia (no color) | #7D7D7D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B79CF
#5B79CF
oklch(59.4% 0.136 267.7)
- #9D7900
#9D7900
oklch(59.5% 0.122 87.7)
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 #5B79CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.045
- Soft Blue #6488EA ΔE 0.055
- Cool Blue #4984B8 ΔE 0.055
- Steel Blue #4682B4 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Water Blue #0E87CC ΔE 0.060
- Royal Blue #4169E1 ΔE 0.062
- Cornflower #6A79F7 ΔE 0.064
Use #5B79CF 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.