#505EAF
Closest named color: French Blue (#436BAD). oklch(51.1% 0.128 273.6), rgb(80, 94, 175).
Aa
White text reads best on this color (5.89:1).
About this color
#505EAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.128 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.038 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #505EAF |
| RGB | rgb(80, 94, 175) |
| HSL | hsl(231, 37%, 50%) |
| OKLCH | oklch(51.1% 0.128 273.6) |
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 #505EAF | 5.89:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #505EAF | 3.56:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #505EAF text on white | 5.89:1 | AA | Lc 79.3 | Fine for body text |
| #505EAF text on black | 3.56:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B3BEEA
oklch(80.8% 0.063 273.9)
-
Step 400
400
#8D9CDF
oklch(70.7% 0.1 273.9)
-
Step 500
500
#7182D6
oklch(63% 0.128 273.5)
-
Step 600
600
#5B6AC3
oklch(55.6% 0.138 273.9)
-
Step 700
700 (this color)
#505EAF
oklch(51.1% 0.128 273.6)
-
Step 800
800
#3D4888
oklch(42.6% 0.106 273.7)
-
Step 900
900
#343D6D
oklch(37.7% 0.083 273.8)
-
Step 950
950
#1E2440
oklch(27% 0.053 273.2)
#505EAF 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) | #3A68B2 | 0.033 |
| Deuteranopia (no green cones) | #2F60AD | 0.037 |
| Tritanopia (no blue cones) | #21707E | 0.114 |
| Achromatopsia (no color) | #646464 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505EAF
#505EAF
oklch(51.1% 0.128 273.6)
- #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 #505EAF, closest first.
No curated palette has a color within ΔE 0.04 of #505EAF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.038
- Iris #6258C4 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.046
- Mid Blue #276AB3 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.062
- Dark Periwinkle #665FD1 ΔE 0.062
- Twilight #4E518B ΔE 0.063
Use #505EAF 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.