#516FF4
Closest named color: Royal Blue (#4169E1). oklch(59.3% 0.202 269.7), rgb(81, 111, 244).
Aa
Black text reads best on this color (4.92:1).
About this color
#516FF4 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.202 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.038 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.92:1 |
| White text | 4.25:1 |
Values
| HEX | #516FF4 |
| RGB | rgb(81, 111, 244) |
| HSL | hsl(229, 88%, 64%) |
| OKLCH | oklch(59.3% 0.202 269.7) |
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 #516FF4 | 4.25:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #516FF4 | 4.92:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #516FF4 text on white | 4.25:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #516FF4 text on black | 4.92:1 | AA | Lc -32.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFB
oklch(70.7% 0.146 269.8)
-
Step 500
500
#5E7EF8
oklch(63.2% 0.185 269.4)
-
Step 600
600 (this color)
#516FF4
oklch(59.3% 0.202 269.7)
-
Step 700
700
#3A51C9
oklch(49.2% 0.187 269.8)
-
Step 800
800
#2F43A2
oklch(42.6% 0.155 269.6)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#516FF4 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) | #0082F9 | 0.056 |
| Deuteranopia (no green cones) | #0073F1 | 0.047 |
| Tritanopia (no blue cones) | #008FA7 | 0.165 |
| Achromatopsia (no color) | #7B7B7B | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516FF4
#516FF4
oklch(59.3% 0.202 269.7)
- #9B7A00
#9B7A00
oklch(59.5% 0.121 89.7)
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 #516FF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.038
- Neon Blue #4361EE ΔE 0.040
- Clear Blue #247AFD ΔE 0.040
- Cornflower #6A79F7 ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.056
- Bright Blue #0165FC ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.065
Use #516FF4 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.