#506BBF
Closest named color: French Blue (#436BAD). oklch(54.8% 0.135 268.3), rgb(80, 107, 191).
Aa
White text reads best on this color (5.00:1).
About this color
#506BBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.135 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.033 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #506BBF |
| RGB | rgb(80, 107, 191) |
| HSL | hsl(225, 46%, 53%) |
| OKLCH | oklch(54.8% 0.135 268.3) |
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 #506BBF | 5.00:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #506BBF | 4.19:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #506BBF text on white | 5.00:1 | AA | Lc 74.4 | Content text, not long reading |
| #506BBF text on black | 4.19:1 | AA large text | Lc -27.3 | 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 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B0C0E9
oklch(80.9% 0.061 268.3)
-
Step 400
400
#879EDE
oklch(70.7% 0.098 268.7)
-
Step 500
500
#6A85D4
oklch(63.1% 0.123 268.4)
-
Step 600
600 (this color)
#506BBF
oklch(54.8% 0.135 268.3)
-
Step 700
700
#435BA7
oklch(49.1% 0.125 268.4)
-
Step 800
800
#374B87
oklch(42.8% 0.103 268)
-
Step 900
900
#2F3F6C
oklch(37.7% 0.08 267.7)
-
Step 950
950
#1C253F
oklch(27% 0.05 268.4)
#506BBF 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) | #4575C2 | 0.027 |
| Deuteranopia (no green cones) | #366BBD | 0.027 |
| Tritanopia (no blue cones) | #007E8C | 0.119 |
| Achromatopsia (no color) | #6F6F6F | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506BBF
#506BBF
oklch(54.8% 0.135 268.3)
- #8C6C00
#8C6C00
oklch(54.8% 0.112 88.1)
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 #506BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.033
- Windows Blue #3778BF ΔE 0.040
- Mid Blue #276AB3 ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.051
- Iris #6258C4 ΔE 0.053
- Royal Blue #4169E1 ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.059
Use #506BBF 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.