#4576BB
Closest named color: Windows Blue (#3778BF). oklch(56.4% 0.12 257.2), rgb(69, 118, 187).
Aa
White text reads best on this color (4.60:1).
About this color
#4576BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.120 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.013 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #4576BB |
| RGB | rgb(69, 118, 187) |
| HSL | hsl(215, 46%, 50%) |
| OKLCH | oklch(56.4% 0.12 257.2) |
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 #4576BB | 4.60:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #4576BB | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #4576BB text on white | 4.60:1 | AA | Lc 71.8 | Content text, not long reading |
| #4576BB text on black | 4.56:1 | AA | Lc -29.9 | Dividers and decoration only |
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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC2E4
oklch(80.8% 0.054 258)
-
Step 400
400
#7EA3D6
oklch(70.8% 0.086 256.5)
-
Step 500
500
#5D8BCC
oklch(63.2% 0.111 257.1)
-
Step 600
600 (this color)
#4576BB
oklch(56.4% 0.12 257.2)
-
Step 700
700
#34619F
oklch(49.2% 0.112 256.9)
-
Step 800
800
#2C4F81
oklch(42.7% 0.093 257.5)
-
Step 900
900
#284267
oklch(37.7% 0.071 257.3)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#4576BB 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) | #587BBE | 0.027 |
| Deuteranopia (no green cones) | #4870BA | 0.016 |
| Tritanopia (no blue cones) | #00868F | 0.101 |
| Achromatopsia (no color) | #757575 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4576BB
#4576BB
oklch(56.4% 0.12 257.2)
- #9C6B00
#9C6B00
oklch(56.5% 0.118 77.2)
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 #4576BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.013
- Flat Blue #3C73A8 ΔE 0.032
- French Blue #436BAD ΔE 0.035
- Steel Blue #4682B4 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.042
- Muted Blue #3B719F ΔE 0.046
- Mid Blue #276AB3 ΔE 0.046
Use #4576BB 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.