#506FCE
Closest named color: Royal Blue (#4169E1). oklch(56.6% 0.151 267.8), rgb(80, 111, 206).
Aa
White text reads best on this color (4.66:1).
About this color
#506FCE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.151 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.038 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #506FCE |
| RGB | rgb(80, 111, 206) |
| HSL | hsl(225, 56%, 56%) |
| OKLCH | oklch(56.6% 0.151 267.8) |
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 #506FCE | 4.66:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #506FCE | 4.50:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #506FCE text on white | 4.66:1 | AA | Lc 72.1 | Content text, not long reading |
| #506FCE text on black | 4.50:1 | AA | Lc -29.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#AEC0ED
oklch(81% 0.067 267.8)
-
Step 400
400
#839EE5
oklch(70.7% 0.109 267.7)
-
Step 500
500
#6584DD
oklch(63.1% 0.139 267.8)
-
Step 600
600 (this color)
#506FCE
oklch(56.6% 0.151 267.8)
-
Step 700
700
#3E5AAF
oklch(49.2% 0.139 267.4)
-
Step 800
800
#344A8E
oklch(42.8% 0.115 267.8)
-
Step 900
900
#2D3E71
oklch(37.7% 0.09 268)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#506FCE 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) | #417AD2 | 0.030 |
| Deuteranopia (no green cones) | #2C6FCC | 0.033 |
| Tritanopia (no blue cones) | #008594 | 0.131 |
| Achromatopsia (no color) | #747474 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506FCE
#506FCE
oklch(56.6% 0.151 267.8)
- #937100
#937100
oklch(56.6% 0.116 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 #506FCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.038
- Windows Blue #3778BF ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.046
- French Blue #436BAD ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.058
- Iris #6258C4 ΔE 0.059
- Light Indigo #6D5ACF ΔE 0.061
- Mid Blue #276AB3 ΔE 0.061
Use #506FCE 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.