#506DBD
Closest named color: French Blue (#436BAD). oklch(55.1% 0.129 267.1), rgb(80, 109, 189).
Aa
White text reads best on this color (4.92:1).
About this color
#506DBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.129 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.030 away. White text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #506DBD |
| RGB | rgb(80, 109, 189) |
| HSL | hsl(224, 45%, 53%) |
| OKLCH | oklch(55.1% 0.129 267.1) |
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 #506DBD | 4.92:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #506DBD | 4.26:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #506DBD text on white | 4.92:1 | AA | Lc 73.9 | Content text, not long reading |
| #506DBD text on black | 4.26:1 | AA large text | Lc -27.8 | 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 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
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#879FDB
oklch(70.7% 0.092 267.3)
-
Step 500
500
#6986D1
oklch(63.1% 0.118 267)
-
Step 600
600 (this color)
#506DBD
oklch(55.1% 0.129 267.1)
-
Step 700
700
#425CA4
oklch(49.1% 0.119 267)
-
Step 800
800
#364B85
oklch(42.6% 0.1 267.1)
-
Step 900
900
#2F3F6B
oklch(37.6% 0.078 267.5)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#506DBD 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) | #4A76C0 | 0.024 |
| Deuteranopia (no green cones) | #3C6CBB | 0.022 |
| Tritanopia (no blue cones) | #007F8C | 0.115 |
| Achromatopsia (no color) | #707070 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506DBD
#506DBD
oklch(55.1% 0.129 267.1)
- #8E6D00
#8E6D00
oklch(55.2% 0.113 87.6)
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 #506DBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.030
- Windows Blue #3778BF ΔE 0.035
- Mid Blue #276AB3 ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.056
- Muted Blue #3B719F ΔE 0.057
- Iris #6258C4 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.060
Use #506DBD 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.