#4579BB
Closest named color: Windows Blue (#3778BF). oklch(57.1% 0.117 255.2), rgb(69, 121, 187).
Aa
Black text reads best on this color (4.70:1).
About this color
#4579BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.117 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.014 away. Black text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #4579BB |
| RGB | rgb(69, 121, 187) |
| HSL | hsl(214, 46%, 50%) |
| OKLCH | oklch(57.1% 0.117 255.2) |
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 #4579BB | 4.46:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #4579BB | 4.70:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #4579BB text on white | 4.46:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #4579BB text on black | 4.70:1 | AA | Lc -30.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7DA3D5
oklch(70.7% 0.085 255.5)
-
Step 500
500
#5B8CC9
oklch(63.1% 0.107 254.6)
-
Step 600
600 (this color)
#4579BB
oklch(57.1% 0.117 255.2)
-
Step 700
700
#32629D
oklch(49.2% 0.109 254.8)
-
Step 800
800
#2A507F
oklch(42.7% 0.09 254.8)
-
Step 900
900
#274366
oklch(37.8% 0.069 254.8)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#4579BB 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) | #5D7DBE | 0.030 |
| Deuteranopia (no green cones) | #4C72BA | 0.019 |
| Tritanopia (no blue cones) | #008891 | 0.096 |
| Achromatopsia (no color) | #777777 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4579BB
#4579BB
oklch(57.1% 0.117 255.2)
- #9F6C0C
#9F6C0C
oklch(57.1% 0.117 75.2)
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 #4579BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.014
- Steel Blue #4682B4 ΔE 0.030
- Cool Blue #4984B8 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.034
- Nice Blue #107AB0 ΔE 0.038
- French Blue #436BAD ΔE 0.042
- Water Blue #0E87CC ΔE 0.046
- Off Blue #5684AE ΔE 0.046
Use #4579BB 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.