#506BDB
Closest named color: Royal Blue (#4169E1). oklch(56.7% 0.173 269.9), rgb(80, 107, 219).
Aa
White text reads best on this color (4.70:1).
About this color
#506BDB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.173 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.020 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #506BDB |
| RGB | rgb(80, 107, 219) |
| HSL | hsl(228, 66%, 59%) |
| OKLCH | oklch(56.7% 0.173 269.9) |
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 #506BDB | 4.70:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #506BDB | 4.46:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #506BDB text on white | 4.70:1 | AA | Lc 72.3 | Content text, not long reading |
| #506BDB text on black | 4.46:1 | AA large text | Lc -29.4 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#829CEF
oklch(70.7% 0.125 269.8)
-
Step 500
500
#6481E9
oklch(63.1% 0.159 269.7)
-
Step 600
600 (this color)
#506BDB
oklch(56.7% 0.173 269.9)
-
Step 700
700
#3F55BB
oklch(49.1% 0.162 270.2)
-
Step 800
800
#334697
oklch(42.6% 0.134 269.9)
-
Step 900
900
#2C3C78
oklch(37.6% 0.104 269.6)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#506BDB 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) | #297ADF | 0.045 |
| Deuteranopia (no green cones) | #006ED9 | 0.049 |
| Tritanopia (no blue cones) | #008599 | 0.145 |
| Achromatopsia (no color) | #747474 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #506BDB
#506BDB
oklch(56.7% 0.173 269.9)
- #917200
#917200
oklch(56.6% 0.116 89.7)
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 #506BDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.020
- Dark Periwinkle #665FD1 ΔE 0.039
- Neon Blue #4361EE ΔE 0.042
- Warm Blue #4B57DB ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.054
- Iris #6258C4 ΔE 0.057
Use #506BDB 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.