#506CB8
Closest named color: French Blue (#436BAD). oklch(54.6% 0.123 267.1), rgb(80, 108, 184).
Aa
White text reads best on this color (5.02:1).
About this color
#506CB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.123 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.024 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.17:1 |
| White text | 5.02:1 |
Values
| HEX | #506CB8 |
| RGB | rgb(80, 108, 184) |
| HSL | hsl(224, 42%, 52%) |
| OKLCH | oklch(54.6% 0.123 267.1) |
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 #506CB8 | 5.02:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #506CB8 | 4.17:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #506CB8 text on white | 5.02:1 | AA | Lc 74.6 | Content text, not long reading |
| #506CB8 text on black | 4.17:1 | AA large text | Lc -27.1 | 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 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E5
oklch(80.9% 0.055 267.8)
-
Step 400
400
#889FD9
oklch(70.7% 0.089 267.5)
-
Step 500
500
#6B86CE
oklch(63% 0.113 267.5)
-
Step 600
600 (this color)
#506CB8
oklch(54.6% 0.123 267.1)
-
Step 700
700
#435CA1
oklch(48.9% 0.115 267.1)
-
Step 800
800
#374C83
oklch(42.7% 0.095 266.7)
-
Step 900
900
#304069
oklch(37.8% 0.073 266.8)
-
Step 950
950
#1C253D
oklch(26.9% 0.047 267.6)
#506CB8 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) | #4C74BB | 0.021 |
| Deuteranopia (no green cones) | #3F6BB6 | 0.020 |
| Tritanopia (no blue cones) | #0C7D89 | 0.111 |
| Achromatopsia (no color) | #6F6F6F | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506CB8
#506CB8
oklch(54.6% 0.123 267.1)
- #8C6B00
#8C6B00
oklch(54.6% 0.112 87.2)
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 #506CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.024
- Windows Blue #3778BF ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.041
- Muted Blue #3B719F ΔE 0.051
- Dull Blue #49759C ΔE 0.057
- Nice Blue #107AB0 ΔE 0.059
- Iris #6258C4 ΔE 0.060
Use #506CB8 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.