#505AA9
Closest named color: Dusky Blue (#475F94). oklch(49.9% 0.125 275.5), rgb(80, 90, 169).
Aa
White text reads best on this color (6.21:1).
About this color
#505AA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.125 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.041 away. White text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #505AA9 |
| RGB | rgb(80, 90, 169) |
| HSL | hsl(233, 36%, 49%) |
| OKLCH | oklch(49.9% 0.125 275.5) |
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 #505AA9 | 6.21:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #505AA9 | 3.37:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #505AA9 text on white | 6.21:1 | AA | Lc 80.8 | Fine for body text |
| #505AA9 text on black | 3.37:1 | AA large text | Lc -21.0 | 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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B5BEE8
oklch(80.9% 0.06 275.5)
-
Step 400
400
#8F9CDD
oklch(70.8% 0.096 275)
-
Step 500
500
#7582D4
oklch(63.2% 0.124 275.5)
-
Step 600
600
#5E6AC1
oklch(55.6% 0.135 275.2)
-
Step 700
700 (this color)
#505AA9
oklch(49.9% 0.125 275.5)
-
Step 800
800
#404887
oklch(42.7% 0.104 275.6)
-
Step 900
900
#363D6C
oklch(37.8% 0.081 275.5)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#505AA9 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) | #3765AC | 0.038 |
| Deuteranopia (no green cones) | #2E5DA7 | 0.039 |
| Tritanopia (no blue cones) | #296B79 | 0.110 |
| Achromatopsia (no color) | #616161 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505AA9
#505AA9
oklch(49.9% 0.125 275.5)
- #756200
#756200
oklch(50% 0.103 95.8)
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 #505AA9, closest first.
No curated palette has a color within ΔE 0.04 of #505AA9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.041
- French Blue #436BAD ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.047
- Twilight #4E518B ΔE 0.051
- Iris #6258C4 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
- Denim #3B638C ΔE 0.063
- Dusk #4E5481 ΔE 0.064
Use #505AA9 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.