#516FB3
Closest named color: French Blue (#436BAD). oklch(55% 0.112 264.9), rgb(81, 111, 179).
Aa
White text reads best on this color (4.91:1).
About this color
#516FB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.112 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.022 away. White text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.27:1 |
| White text | 4.91:1 |
Values
| HEX | #516FB3 |
| RGB | rgb(81, 111, 179) |
| HSL | hsl(222, 39%, 51%) |
| OKLCH | oklch(55% 0.112 264.9) |
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 #516FB3 | 4.91:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #516FB3 | 4.27:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #516FB3 text on white | 4.91:1 | AA | Lc 73.9 | Content text, not long reading |
| #516FB3 text on black | 4.27:1 | AA large text | Lc -27.8 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9EC
oklch(88.4% 0.028 265.4)
-
Step 300
300
#B1C1E2
oklch(81% 0.05 264.8)
-
Step 400
400
#88A0D4
oklch(70.7% 0.081 265.2)
-
Step 500
500
#6B88C8
oklch(63.1% 0.103 265)
-
Step 600
600 (this color)
#516FB3
oklch(55% 0.112 264.9)
-
Step 700
700
#435E9C
oklch(49.1% 0.105 265)
-
Step 800
800
#374D7E
oklch(42.6% 0.086 264.7)
-
Step 900
900
#304065
oklch(37.6% 0.067 265.5)
-
Step 950
950
#1C263B
oklch(27% 0.042 264.3)
#516FB3 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) | #5375B6 | 0.017 |
| Deuteranopia (no green cones) | #486CB2 | 0.014 |
| Tritanopia (no blue cones) | #1A7E88 | 0.101 |
| Achromatopsia (no color) | #717171 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516FB3
#516FB3
oklch(55% 0.112 264.9)
- #8F6B02
#8F6B02
oklch(54.9% 0.112 85.1)
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 #516FB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.022
- Flat Blue #3C73A8 ΔE 0.032
- Windows Blue #3778BF ΔE 0.034
- Muted Blue #3B719F ΔE 0.042
- Mid Blue #276AB3 ΔE 0.044
- Dull Blue #49759C ΔE 0.045
- Nice Blue #107AB0 ΔE 0.053
- Steel Blue #4682B4 ΔE 0.053
Use #516FB3 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.