#516AD8
Closest named color: Royal Blue (#4169E1). oklch(56.3% 0.17 270.4), rgb(81, 106, 216).
Aa
White text reads best on this color (4.76:1).
About this color
#516AD8 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.170 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.022 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #516AD8 |
| RGB | rgb(81, 106, 216) |
| HSL | hsl(229, 63%, 58%) |
| OKLCH | oklch(56.3% 0.17 270.4) |
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 #516AD8 | 4.76:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #516AD8 | 4.40:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #516AD8 text on white | 4.76:1 | AA | Lc 72.8 | Content text, not long reading |
| #516AD8 text on black | 4.40:1 | AA large text | Lc -28.9 | 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
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#AEBFF3
oklch(81% 0.076 270.6)
-
Step 400
400
#849CED
oklch(70.8% 0.122 270.5)
-
Step 500
500
#6681E7
oklch(63.1% 0.156 270.3)
-
Step 600
600 (this color)
#516AD8
oklch(56.3% 0.17 270.4)
-
Step 700
700
#4056B9
oklch(49.2% 0.158 270.2)
-
Step 800
800
#354796
oklch(42.8% 0.131 270.3)
-
Step 900
900
#2D3C77
oklch(37.6% 0.102 270.2)
-
Step 950
950
#1B2446
oklch(27.1% 0.064 270.5)
#516AD8 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) | #2A79DC | 0.046 |
| Deuteranopia (no green cones) | #006DD6 | 0.051 |
| Tritanopia (no blue cones) | #008497 | 0.145 |
| Achromatopsia (no color) | #737373 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516AD8
#516AD8
oklch(56.3% 0.17 270.4)
- #8F7200
#8F7200
oklch(56.4% 0.115 91)
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 #516AD8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.022
- Dark Periwinkle #665FD1 ΔE 0.036
- Neon Blue #4361EE ΔE 0.045
- Warm Blue #4B57DB ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.051
- Iris #6258C4 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.056
Use #516AD8 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.