#516DF4
Closest named color: Neon Blue (#4361EE). oklch(59% 0.204 270.1), rgb(81, 109, 244).
Aa
Black text reads best on this color (4.84:1).
About this color
#516DF4 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.204 and its hue 270°. 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 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #516DF4 |
| RGB | rgb(81, 109, 244) |
| HSL | hsl(230, 88%, 64%) |
| OKLCH | oklch(59% 0.204 270.1) |
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 #516DF4 | 4.33:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #516DF4 | 4.84:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #516DF4 text on white | 4.33:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #516DF4 text on black | 4.84:1 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#A9BEFD
oklch(80.8% 0.092 270)
-
Step 400
400
#7D9AFC
oklch(70.7% 0.147 269.9)
-
Step 500
500
#5F7DF9
oklch(63.1% 0.187 270.1)
-
Step 600
600 (this color)
#516DF4
oklch(59% 0.204 270.1)
-
Step 700
700
#3A50CA
oklch(49.1% 0.19 270)
-
Step 800
800
#3043A3
oklch(42.8% 0.156 270)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#516DF4 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) | #0081F9 | 0.058 |
| Deuteranopia (no green cones) | #0072F1 | 0.047 |
| Tritanopia (no blue cones) | #008EA6 | 0.167 |
| Achromatopsia (no color) | #797979 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516DF4
#516DF4
oklch(59% 0.204 270.1)
- #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 #516DF4, 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 0.036
- Clear Blue #247AFD ΔE 0.043
- Cornflower #6A79F7 ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.049
- Medium Slate Blue #7B68EE ΔE 0.056
- Bright Blue #0165FC ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.064
Use #516DF4 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.