#516DB2
Closest named color: French Blue (#436BAD). oklch(54.5% 0.113 266.1), rgb(81, 109, 178).
Aa
White text reads best on this color (5.02:1).
About this color
#516DB2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.113 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.019 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.18:1 |
| White text | 5.02:1 |
Values
| HEX | #516DB2 |
| RGB | rgb(81, 109, 178) |
| HSL | hsl(223, 39%, 51%) |
| OKLCH | oklch(54.5% 0.113 266.1) |
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 #516DB2 | 5.02:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #516DB2 | 4.18:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #516DB2 text on white | 5.02:1 | AA | Lc 74.6 | Content text, not long reading |
| #516DB2 text on black | 4.18:1 | AA large text | Lc -27.1 | 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
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C1E2
oklch(81% 0.05 264.8)
-
Step 400
400
#89A0D4
oklch(70.8% 0.081 265.9)
-
Step 500
500
#6C87C9
oklch(63% 0.105 266.5)
-
Step 600
600 (this color)
#516DB2
oklch(54.5% 0.113 266.1)
-
Step 700
700
#445E9C
oklch(49.1% 0.105 265.5)
-
Step 800
800
#384D7F
oklch(42.8% 0.087 265.6)
-
Step 900
900
#314066
oklch(37.7% 0.068 266.8)
-
Step 950
950
#1C263C
oklch(27.1% 0.044 265)
#516DB2 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) | #5174B5 | 0.019 |
| Deuteranopia (no green cones) | #456BB1 | 0.016 |
| Tritanopia (no blue cones) | #1D7C87 | 0.101 |
| Achromatopsia (no color) | #6F6F6F | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516DB2
#516DB2
oklch(54.5% 0.113 266.1)
- #8D6A00
#8D6A00
oklch(54.5% 0.112 85.7)
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 #516DB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.033
- Windows Blue #3778BF ΔE 0.038
- Mid Blue #276AB3 ΔE 0.042
- Muted Blue #3B719F ΔE 0.042
- Dull Blue #49759C ΔE 0.047
- Nice Blue #107AB0 ΔE 0.055
- Steel Blue #4682B4 ΔE 0.058
Use #516DB2 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.