#516CFF
Closest named color: Neon Blue (#4361EE). oklch(59.6% 0.219 270.4), rgb(81, 108, 255).
Aa
Black text reads best on this color (4.93:1).
About this color
#516CFF is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.219 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.041 away. Black text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.219) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #516CFF |
| RGB | rgb(81, 108, 255) |
| HSL | hsl(231, 100%, 66%) |
| OKLCH | oklch(59.6% 0.219 270.4) |
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 #516CFF | 4.25:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #516CFF | 4.93:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #516CFF text on white | 4.25:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #516CFF text on black | 4.93:1 | AA | Lc -32.8 | 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 500.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500 (this color)
#516CFF
oklch(59.6% 0.219 270.4)
-
Step 600
600
#445AFB
oklch(55.5% 0.238 270.3)
-
Step 700
700
#3748DB
oklch(49% 0.222 270.3)
-
Step 800
800
#2D3DB1
oklch(42.7% 0.183 270.3)
-
Step 900
900
#27368C
oklch(37.7% 0.143 270.4)
-
Step 950
950
#162152
oklch(27.1% 0.09 269.8)
#516CFF 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) | #0083FF | 0.062 |
| Deuteranopia (no green cones) | #0073FC | 0.047 |
| Tritanopia (no blue cones) | #0090AB | 0.177 |
| Achromatopsia (no color) | #7B7B7B | 0.220 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516CFF
#516CFF
oklch(59.6% 0.219 270.4)
- #9B7B00
#9B7B00
oklch(59.7% 0.122 90.4)
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 #516CFF, closest first.
No curated palette has a color within ΔE 0.04 of #516CFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.041
- Clear Blue #247AFD ΔE 0.043
- Cornflower #6A79F7 ΔE 0.048
- Royal Blue #4169E1 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.055
- Bright Blue #0165FC ΔE 0.056
- Medium Slate Blue #7B68EE ΔE 0.060
- Azul #1D5DEC ΔE 0.069
Use #516CFF 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.