#516CE0
Closest named color: Royal Blue (#4169E1). oklch(57.3% 0.179 270), rgb(81, 108, 224).
Aa
White text reads best on this color (4.59:1).
About this color
#516CE0 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.179 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 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #516CE0 |
| RGB | rgb(81, 108, 224) |
| HSL | hsl(229, 70%, 60%) |
| OKLCH | oklch(57.3% 0.179 270) |
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 #516CE0 | 4.59:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #516CE0 | 4.57:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #516CE0 text on white | 4.59:1 | AA | Lc 71.6 | Content text, not long reading |
| #516CE0 text on black | 4.57:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CDD8F8
oklch(88.4% 0.046 270.4)
-
Step 300
300
#ACBFF5
oklch(80.9% 0.079 269.5)
-
Step 400
400
#829BF1
oklch(70.6% 0.129 270.5)
-
Step 500
500
#6480EC
oklch(63.1% 0.165 270.2)
-
Step 600
600 (this color)
#516CE0
oklch(57.3% 0.179 270)
-
Step 700
700
#3E55BD
oklch(49.2% 0.165 269.9)
-
Step 800
800
#334699
oklch(42.7% 0.137 270)
-
Step 900
900
#2C3C7A
oklch(37.8% 0.107 269.8)
-
Step 950
950
#1A2347
oklch(26.9% 0.068 270.7)
#516CE0 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) | #247CE4 | 0.048 |
| Deuteranopia (no green cones) | #006FDE | 0.050 |
| Tritanopia (no blue cones) | #00879C | 0.149 |
| Achromatopsia (no color) | #757575 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516CE0
#516CE0
oklch(57.3% 0.179 270)
- #937400
#937400
oklch(57.3% 0.117 90)
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 #516CE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.020
- Neon Blue #4361EE ΔE 0.040
- Dark Periwinkle #665FD1 ΔE 0.043
- Cerulean Blue #056EEE ΔE 0.051
- Warm Blue #4B57DB ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.056
- Light Indigo #6D5ACF ΔE 0.057
- Cornflower #6A79F7 ΔE 0.058
Use #516CE0 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.