#505FA5
Closest named color: Dusky Blue (#475F94). oklch(50.7% 0.112 272.7), rgb(80, 95, 165).
Aa
White text reads best on this color (5.96:1).
About this color
#505FA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.112 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.031 away. White text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.52:1 |
| White text | 5.96:1 |
Values
| HEX | #505FA5 |
| RGB | rgb(80, 95, 165) |
| HSL | hsl(229, 35%, 48%) |
| OKLCH | oklch(50.7% 0.112 272.7) |
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 #505FA5 | 5.96:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #505FA5 | 3.52:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #505FA5 text on white | 5.96:1 | AA | Lc 79.7 | Fine for body text |
| #505FA5 text on black | 3.52:1 | AA large text | Lc -22.1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EE
oklch(88.4% 0.031 273.6)
-
Step 300
300
#B4BFE5
oklch(80.9% 0.055 272.4)
-
Step 400
400
#8E9DD7
oklch(70.6% 0.087 272.8)
-
Step 500
500
#7384CD
oklch(63.1% 0.112 272.9)
-
Step 600
600
#5C6DBA
oklch(55.7% 0.121 272.5)
-
Step 700
700 (this color)
#505FA5
oklch(50.7% 0.112 272.7)
-
Step 800
800
#3E4A82
oklch(42.7% 0.094 272.7)
-
Step 900
900
#353E68
oklch(37.7% 0.073 273.3)
-
Step 950
950
#1F253D
oklch(27.1% 0.046 272.4)
#505FA5 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) | #4367A8 | 0.025 |
| Deuteranopia (no green cones) | #3A60A3 | 0.027 |
| Tritanopia (no blue cones) | #2B6E7A | 0.100 |
| Achromatopsia (no color) | #636363 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505FA5
#505FA5
oklch(50.7% 0.112 272.7)
- #7A6300
#7A6300
oklch(50.8% 0.104 92.9)
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 #505FA5, closest first.
No curated palette has a color within ΔE 0.04 of #505FA5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.031
- French Blue #436BAD ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.048
- Denim #3B638C ΔE 0.052
- Twilight #4E518B ΔE 0.052
- Muted Blue #3B719F ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.057
Use #505FA5 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.