#516BD3
Closest named color: Royal Blue (#4169E1). oklch(56.2% 0.162 269.9), rgb(81, 107, 211).
Aa
White text reads best on this color (4.77:1).
About this color
#516BD3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.162 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.028 away. White text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.39:1 |
| White text | 4.77:1 |
Values
| HEX | #516BD3 |
| RGB | rgb(81, 107, 211) |
| HSL | hsl(228, 60%, 57%) |
| OKLCH | oklch(56.2% 0.162 269.9) |
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 #516BD3 | 4.77:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #516BD3 | 4.39:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #516BD3 text on white | 4.77:1 | AA | Lc 72.9 | Content text, not long reading |
| #516BD3 text on black | 4.39:1 | AA large text | Lc -28.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#849CEA
oklch(70.6% 0.118 270.2)
-
Step 500
500
#6782E3
oklch(63.1% 0.149 270)
-
Step 600
600 (this color)
#516BD3
oklch(56.2% 0.162 269.9)
-
Step 700
700
#4157B5
oklch(49.1% 0.151 270.1)
-
Step 800
800
#354892
oklch(42.7% 0.124 269.7)
-
Step 900
900
#2E3D75
oklch(37.8% 0.097 270)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#516BD3 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) | #3479D7 | 0.041 |
| Deuteranopia (no green cones) | #166DD1 | 0.046 |
| Tritanopia (no blue cones) | #008395 | 0.139 |
| Achromatopsia (no color) | #727272 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516BD3
#516BD3
oklch(56.2% 0.162 269.9)
- #8F7100
#8F7100
oklch(56.2% 0.115 90.2)
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 #516BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.028
- Dark Periwinkle #665FD1 ΔE 0.037
- Slate Blue #6A5ACD ΔE 0.050
- Iris #6258C4 ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.052
- Warm Blue #4B57DB ΔE 0.052
- Neon Blue #4361EE ΔE 0.052
- Windows Blue #3778BF ΔE 0.055
Use #516BD3 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.