#516AC4
Closest named color: French Blue (#436BAD). oklch(55% 0.143 269.6), rgb(81, 106, 196).
Aa
White text reads best on this color (4.98:1).
About this color
#516AC4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.143 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.041 away. White text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.20:1 |
| White text | 4.98:1 |
Values
| HEX | #516AC4 |
| RGB | rgb(81, 106, 196) |
| HSL | hsl(227, 49%, 54%) |
| OKLCH | oklch(55% 0.143 269.6) |
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 #516AC4 | 4.98:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #516AC4 | 4.20:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #516AC4 text on white | 4.98:1 | AA | Lc 74.3 | Content text, not long reading |
| #516AC4 text on black | 4.20:1 | AA large text | Lc -27.4 | Dividers and decoration only |
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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F2
oklch(88.6% 0.036 269.9)
-
Step 300
300
#B0BFEB
oklch(80.8% 0.065 270.2)
-
Step 400
400
#879EE1
oklch(70.8% 0.102 269.2)
-
Step 500
500
#6A84D9
oklch(63.1% 0.132 269.5)
-
Step 600
600 (this color)
#516AC4
oklch(55% 0.143 269.6)
-
Step 700
700
#435AAB
oklch(49.2% 0.132 269.2)
-
Step 800
800
#374A8B
oklch(42.8% 0.11 269.1)
-
Step 900
900
#303E6F
oklch(37.7% 0.086 269.9)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#516AC4 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) | #4075C7 | 0.031 |
| Deuteranopia (no green cones) | #2F6BC2 | 0.034 |
| Tritanopia (no blue cones) | #007E8D | 0.126 |
| Achromatopsia (no color) | #6F6F6F | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516AC4
#516AC4
oklch(55% 0.143 269.6)
- #8B6D00
#8B6D00
oklch(54.9% 0.112 89.6)
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 #516AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.044
- Windows Blue #3778BF ΔE 0.044
- Royal Blue #4169E1 ΔE 0.048
- Iris #6258C4 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.056
Use #516AC4 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.