#506DAD
Closest named color: French Blue (#436BAD). oklch(54.2% 0.106 264.6), rgb(80, 109, 173).
Aa
White text reads best on this color (5.08:1).
About this color
#506DAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.106 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #506DAD |
| RGB | rgb(80, 109, 173) |
| HSL | hsl(221, 37%, 50%) |
| OKLCH | oklch(54.2% 0.106 264.6) |
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 #506DAD | 5.08:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #506DAD | 4.13:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #506DAD text on white | 5.08:1 | AA | Lc 75.0 | Content text, not long reading |
| #506DAD text on black | 4.13:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#89A0D1
oklch(70.6% 0.077 265)
-
Step 500
500
#6C88C5
oklch(63.1% 0.098 264.9)
-
Step 600
600 (this color)
#506DAD
oklch(54.2% 0.106 264.6)
-
Step 700
700
#445F99
oklch(49.2% 0.099 264.2)
-
Step 800
800
#384D7C
oklch(42.6% 0.083 264.9)
-
Step 900
900
#314164
oklch(37.8% 0.064 264.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#506DAD 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) | #5373B0 | 0.018 |
| Deuteranopia (no green cones) | #496AAC | 0.013 |
| Tritanopia (no blue cones) | #207B85 | 0.095 |
| Achromatopsia (no color) | #6E6E6E | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506DAD
#506DAD
oklch(54.2% 0.106 264.6)
- #8C690F
#8C690F
oklch(54.2% 0.106 84.3)
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 #506DAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.028
- Muted Blue #3B719F ΔE 0.036
- Windows Blue #3778BF ΔE 0.040
- Dull Blue #49759C ΔE 0.040
- Mid Blue #276AB3 ΔE 0.042
- Nice Blue #107AB0 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.053
Use #506DAD 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.