#505FAA
Closest named color: French Blue (#436BAD). oklch(51% 0.12 272.9), rgb(80, 95, 170).
Aa
White text reads best on this color (5.90:1).
About this color
#505FAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.120 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.034 away. White text reads best on it, at 5.90:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #505FAA |
| RGB | rgb(80, 95, 170) |
| HSL | hsl(230, 36%, 49%) |
| OKLCH | oklch(51% 0.12 272.9) |
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 #505FAA | 5.90:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #505FAA | 3.55:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #505FAA text on white | 5.90:1 | AA | Lc 79.4 | Fine for body text |
| #505FAA text on black | 3.55:1 | AA large text | Lc -22.5 | 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
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8D9DDB
oklch(70.7% 0.093 272.7)
-
Step 500
500
#7283D1
oklch(63% 0.119 273.2)
-
Step 600
600
#5B6CBE
oklch(55.7% 0.128 272.8)
-
Step 700
700 (this color)
#505FAA
oklch(51% 0.12 272.9)
-
Step 800
800
#3D4985
oklch(42.6% 0.1 272.9)
-
Step 900
900
#343E6A
oklch(37.7% 0.076 272.6)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#505FAA 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) | #3F68AD | 0.029 |
| Deuteranopia (no green cones) | #3661A8 | 0.030 |
| Tritanopia (no blue cones) | #276F7C | 0.106 |
| Achromatopsia (no color) | #646464 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505FAA
#505FAA
oklch(51% 0.12 272.9)
- #7B6400
#7B6400
oklch(51.1% 0.105 93.1)
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 #505FAA, closest first.
No curated palette has a color within ΔE 0.04 of #505FAA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.034
- Dusky Blue #475F94 ΔE 0.038
- Mid Blue #276AB3 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.049
- Iris #6258C4 ΔE 0.053
- Twilight #4E518B ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.058
- Denim #3B638C ΔE 0.059
Use #505FAA 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.