#505DA9
Closest named color: Dusky Blue (#475F94). oklch(50.5% 0.121 274), rgb(80, 93, 169).
Aa
White text reads best on this color (6.03:1).
About this color
#505DA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.121 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.038 away. White text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #505DA9 |
| RGB | rgb(80, 93, 169) |
| HSL | hsl(231, 36%, 49%) |
| OKLCH | oklch(50.5% 0.121 274) |
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 #505DA9 | 6.03:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #505DA9 | 3.47:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #505DA9 text on white | 6.03:1 | AA | Lc 80.0 | Fine for body text |
| #505DA9 text on black | 3.47:1 | AA large text | Lc -21.8 | 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 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
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8E9CDB
oklch(70.6% 0.094 274.1)
-
Step 500
500
#7383D2
oklch(63.1% 0.12 273.8)
-
Step 600
600
#5C6BBF
oklch(55.6% 0.131 273.8)
-
Step 700
700 (this color)
#505DA9
oklch(50.5% 0.121 274)
-
Step 800
800
#3E4985
oklch(42.7% 0.1 273.6)
-
Step 900
900
#353D6B
oklch(37.6% 0.079 274.5)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#505DA9 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) | #3D67AC | 0.032 |
| Deuteranopia (no green cones) | #335FA7 | 0.034 |
| Tritanopia (no blue cones) | #286D7B | 0.106 |
| Achromatopsia (no color) | #636363 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505DA9
#505DA9
oklch(50.5% 0.121 274)
- #786300
#786300
oklch(50.5% 0.104 94.4)
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 #505DA9, closest first.
No curated palette has a color within ΔE 0.04 of #505DA9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.038
- French Blue #436BAD ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.047
- Mid Blue #276AB3 ΔE 0.049
- Iris #6258C4 ΔE 0.053
- Twilight #4E518B ΔE 0.054
- Denim #3B638C ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.063
Use #505DA9 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.