#516DCE
Closest named color: Royal Blue (#4169E1). oklch(56.3% 0.153 269), rgb(81, 109, 206).
Aa
White text reads best on this color (4.74:1).
About this color
#516DCE is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.153 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. White text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #516DCE |
| RGB | rgb(81, 109, 206) |
| HSL | hsl(227, 56%, 56%) |
| OKLCH | oklch(56.3% 0.153 269) |
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 #516DCE | 4.74:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #516DCE | 4.42:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #516DCE text on white | 4.74:1 | AA | Lc 72.7 | Content text, not long reading |
| #516DCE text on black | 4.42:1 | AA large text | Lc -29.0 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AEBFEE
oklch(80.8% 0.069 269.3)
-
Step 400
400
#849DE6
oklch(70.6% 0.111 269)
-
Step 500
500
#6783DE
oklch(63% 0.141 269.2)
-
Step 600
600 (this color)
#516DCE
oklch(56.3% 0.153 269)
-
Step 700
700
#4059B0
oklch(49.1% 0.141 268.7)
-
Step 800
800
#35498F
oklch(42.7% 0.118 269)
-
Step 900
900
#2E3E72
oklch(37.8% 0.091 268.9)
-
Step 950
950
#1B2443
oklch(26.9% 0.059 269.9)
#516DCE 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) | #3D79D2 | 0.034 |
| Deuteranopia (no green cones) | #286ECC | 0.037 |
| Tritanopia (no blue cones) | #008393 | 0.133 |
| Achromatopsia (no color) | #737373 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516DCE
#516DCE
oklch(56.3% 0.153 269)
- #907100
#907100
oklch(56.3% 0.115 89.5)
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 #516DCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.042
- Windows Blue #3778BF ΔE 0.046
- Slate Blue #6A5ACD ΔE 0.054
- Iris #6258C4 ΔE 0.054
- French Blue #436BAD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.056
- Warm Blue #4B57DB ΔE 0.060
Use #516DCE 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.