#516BFA
Closest named color: Neon Blue (#4361EE). oklch(59% 0.214 270.6), rgb(81, 107, 250).
Aa
Black text reads best on this color (4.83:1).
About this color
#516BFA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.214 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.035 away. Black text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.214) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #516BFA |
| RGB | rgb(81, 107, 250) |
| HSL | hsl(231, 94%, 65%) |
| OKLCH | oklch(59% 0.214 270.6) |
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 #516BFA | 4.34:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #516BFA | 4.83:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #516BFA text on white | 4.34:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #516BFA text on black | 4.83:1 | AA | Lc -32.1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
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
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600 (this color)
#516BFA
oklch(59% 0.214 270.6)
-
Step 700
700
#3B4ECF
oklch(49.2% 0.199 270.7)
-
Step 800
800
#3041A7
oklch(42.7% 0.164 270.5)
-
Step 900
900
#293885
oklch(37.6% 0.13 270.6)
-
Step 950
950
#18224E
oklch(27.1% 0.082 270.4)
#516BFA 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) | #0081FF | 0.061 |
| Deuteranopia (no green cones) | #0072F7 | 0.048 |
| Tritanopia (no blue cones) | #008EA8 | 0.174 |
| Achromatopsia (no color) | #797979 | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516BFA
#516BFA
oklch(59% 0.214 270.6)
- #997900
#997900
oklch(59% 0.121 90.1)
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 #516BFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.035
- Royal Blue #4169E1 ΔE 0.043
- Clear Blue #247AFD ΔE 0.044
- Cornflower #6A79F7 ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.052
- Bright Blue #0165FC ΔE 0.055
- Medium Slate Blue #7B68EE ΔE 0.058
- Azul #1D5DEC ΔE 0.065
Use #516BFA 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.