#516DD5
Closest named color: Royal Blue (#4169E1). oklch(56.7% 0.162 269.3), rgb(81, 109, 213).
Aa
White text reads best on this color (4.66:1).
About this color
#516DD5 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.162 and its hue 269°. 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 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.49:1 |
| White text | 4.66:1 |
Values
| HEX | #516DD5 |
| RGB | rgb(81, 109, 213) |
| HSL | hsl(227, 61%, 58%) |
| OKLCH | oklch(56.7% 0.162 269.3) |
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 #516DD5 | 4.66:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #516DD5 | 4.49:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #516DD5 text on white | 4.66:1 | AA | Lc 72.1 | Content text, not long reading |
| #516DD5 text on black | 4.49:1 | AA large text | Lc -29.5 | 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
#ADBFF1
oklch(80.8% 0.074 269.3)
-
Step 400
400
#839DEA
oklch(70.8% 0.117 269.1)
-
Step 500
500
#6582E3
oklch(63% 0.15 269.2)
-
Step 600
600 (this color)
#516DD5
oklch(56.7% 0.162 269.3)
-
Step 700
700
#3F57B5
oklch(49% 0.151 269.3)
-
Step 800
800
#344893
oklch(42.8% 0.125 269.3)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#516DD5 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) | #367AD9 | 0.038 |
| Deuteranopia (no green cones) | #1A6ED3 | 0.044 |
| Tritanopia (no blue cones) | #008597 | 0.138 |
| Achromatopsia (no color) | #747474 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516DD5
#516DD5
oklch(56.7% 0.162 269.3)
- #927200
#927200
oklch(56.7% 0.116 89.1)
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 #516DD5, 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 0.041
- Neon Blue #4361EE ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.053
- Windows Blue #3778BF ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.055
- Warm Blue #4B57DB ΔE 0.056
- Iris #6258C4 ΔE 0.057
Use #516DD5 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.