#516FB8
Closest named color: French Blue (#436BAD). oklch(55.3% 0.119 265.8), rgb(81, 111, 184).
Aa
White text reads best on this color (4.86:1).
About this color
#516FB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.119 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.026 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #516FB8 |
| RGB | rgb(81, 111, 184) |
| HSL | hsl(223, 42%, 52%) |
| OKLCH | oklch(55.3% 0.119 265.8) |
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 #516FB8 | 4.86:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #516FB8 | 4.31:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #516FB8 text on white | 4.86:1 | AA | Lc 73.6 | Content text, not long reading |
| #516FB8 text on black | 4.31:1 | AA large text | Lc -28.1 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#87A0D7
oklch(70.8% 0.086 265.4)
-
Step 500
500
#6A87CC
oklch(63.1% 0.11 266)
-
Step 600
600 (this color)
#516FB8
oklch(55.3% 0.119 265.8)
-
Step 700
700
#425D9F
oklch(49% 0.111 265.7)
-
Step 800
800
#374C81
oklch(42.6% 0.092 266.3)
-
Step 900
900
#2F4068
oklch(37.7% 0.072 265.6)
-
Step 950
950
#1C263D
oklch(27.1% 0.045 265.6)
#516FB8 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) | #5176BB | 0.019 |
| Deuteranopia (no green cones) | #446DB6 | 0.017 |
| Tritanopia (no blue cones) | #117F8A | 0.108 |
| Achromatopsia (no color) | #717171 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516FB8
#516FB8
oklch(55.3% 0.119 265.8)
- #906C00
#906C00
oklch(55.2% 0.113 85.4)
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 #516FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.026
- Windows Blue #3778BF ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.037
- Mid Blue #276AB3 ΔE 0.045
- Muted Blue #3B719F ΔE 0.049
- Dull Blue #49759C ΔE 0.052
- Steel Blue #4682B4 ΔE 0.055
- Nice Blue #107AB0 ΔE 0.055
Use #516FB8 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.