#505A85
Closest named color: Dusk (#4E5481). oklch(47.8% 0.071 273.4), rgb(80, 90, 133).
Aa
White text reads best on this color (6.68:1).
About this color
#505A85 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.071 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.018 away. White text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.14:1 |
| White text | 6.68:1 |
Values
| HEX | #505A85 |
| RGB | rgb(80, 90, 133) |
| HSL | hsl(229, 25%, 42%) |
| OKLCH | oklch(47.8% 0.071 273.4) |
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 #505A85 | 6.68:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #505A85 | 3.14:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #505A85 text on white | 6.68:1 | AA | Lc 83.0 | Fine for body text |
| #505A85 text on black | 3.14:1 | AA large text | Lc -19.0 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D7
oklch(81% 0.033 272.2)
-
Step 400
400
#959FC3
oklch(70.7% 0.054 272.8)
-
Step 500
500
#7C87B4
oklch(63.2% 0.069 273.6)
-
Step 600
600
#6570A0
oklch(55.6% 0.076 273.8)
-
Step 700
700 (this color)
#505A85
oklch(47.8% 0.071 273.4)
-
Step 800
800
#444D6F
oklch(42.7% 0.058 272.4)
-
Step 900
900
#3A405A
oklch(37.7% 0.045 274)
-
Step 950
950
#222635
oklch(27.2% 0.029 272.8)
#505A85 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) | #4C5E87 | 0.012 |
| Deuteranopia (no green cones) | #485A84 | 0.011 |
| Tritanopia (no blue cones) | #406369 | 0.064 |
| Achromatopsia (no color) | #5C5C5C | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505A85
#505A85
oklch(47.8% 0.071 273.4)
- #6A5C2B
#6A5C2B
oklch(47.7% 0.07 93.6)
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 #505A85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.018
- Dusty Grape #545775 ΔE 0.026
- Dusky Blue #475F94 ΔE 0.026
- Twilight #4E518B ΔE 0.030
- YInMn Blue #415A77 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.033
- Denim #3B638C ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.041
Use #505A85 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.