#516FA4
Closest named color: Flat Blue (#3C73A8). oklch(54.2% 0.091 261.3), rgb(81, 111, 164).
Aa
White text reads best on this color (5.04:1).
About this color
#516FA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.091 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.023 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.15:1 |
| White text | 5.04:1 |
Values
| HEX | #516FA4 |
| RGB | rgb(81, 111, 164) |
| HSL | hsl(218, 34%, 48%) |
| OKLCH | oklch(54.2% 0.091 261.3) |
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 #516FA4 | 5.04:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #516FA4 | 4.15:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #516FA4 text on white | 5.04:1 | AA | Lc 74.8 | Content text, not long reading |
| #516FA4 text on black | 4.15:1 | AA large text | Lc -26.9 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C1DC
oklch(80.8% 0.042 262.3)
-
Step 400
400
#8AA1CA
oklch(70.6% 0.066 261.9)
-
Step 500
500
#6D8ABC
oklch(63.1% 0.083 261)
-
Step 600
600 (this color)
#516FA4
oklch(54.2% 0.091 261.3)
-
Step 700
700
#456091
oklch(49% 0.086 261.7)
-
Step 800
800
#394F75
oklch(42.7% 0.069 260.9)
-
Step 900
900
#31425F
oklch(37.8% 0.055 260.8)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#516FA4 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) | #5B73A6 | 0.018 |
| Deuteranopia (no green cones) | #516BA3 | 0.011 |
| Tritanopia (no blue cones) | #2C7A82 | 0.080 |
| Achromatopsia (no color) | #6F6F6F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516FA4
#516FA4
oklch(54.2% 0.091 261.3)
- #8A692A
#8A692A
oklch(54.1% 0.09 80.8)
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 #516FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.023
- Dull Blue #49759C ΔE 0.025
- Muted Blue #3B719F ΔE 0.026
- French Blue #436BAD ΔE 0.026
- Metallic Blue #4F738E ΔE 0.040
- Stormy Blue #507B9C ΔE 0.040
- Cerulean #457B9D ΔE 0.040
- Windows Blue #3778BF ΔE 0.047
Use #516FA4 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.