#506FA3
Closest named color: Flat Blue (#3C73A8). oklch(54.1% 0.09 260.4), rgb(80, 111, 163).
Aa
White text reads best on this color (5.06:1).
About this color
#506FA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.090 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.022 away. White text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #506FA3 |
| RGB | rgb(80, 111, 163) |
| HSL | hsl(218, 34%, 48%) |
| OKLCH | oklch(54.1% 0.09 260.4) |
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 #506FA3 | 5.06:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #506FA3 | 4.14:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #506FA3 text on white | 5.06:1 | AA | Lc 74.9 | Content text, not long reading |
| #506FA3 text on black | 4.14:1 | AA large text | Lc -26.8 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B2C2DB
oklch(81% 0.04 259.3)
-
Step 400
400
#8AA2C9
oklch(70.8% 0.063 260)
-
Step 500
500
#6C8ABC
oklch(63.1% 0.083 260.4)
-
Step 600
600 (this color)
#506FA3
oklch(54.1% 0.09 260.4)
-
Step 700
700
#456190
oklch(49.2% 0.083 260.4)
-
Step 800
800
#394F75
oklch(42.7% 0.069 260.9)
-
Step 900
900
#31425E
oklch(37.7% 0.053 260.1)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#506FA3 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) | #5B73A5 | 0.019 |
| Deuteranopia (no green cones) | #516BA2 | 0.011 |
| Tritanopia (no blue cones) | #2A7A82 | 0.079 |
| Achromatopsia (no color) | #6E6E6E | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506FA3
#506FA3
oklch(54.1% 0.09 260.4)
- #8A692B
#8A692B
oklch(54.2% 0.089 80.5)
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 #506FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.022
- Muted Blue #3B719F ΔE 0.024
- Dull Blue #49759C ΔE 0.024
- French Blue #436BAD ΔE 0.026
- Metallic Blue #4F738E ΔE 0.039
- Cerulean #457B9D ΔE 0.039
- Stormy Blue #507B9C ΔE 0.040
- Windows Blue #3778BF ΔE 0.048
Use #506FA3 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.