#516EB0
Closest named color: French Blue (#436BAD). oklch(54.6% 0.109 265.1), rgb(81, 110, 176).
Aa
White text reads best on this color (4.99:1).
About this color
#516EB0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.109 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.020 away. White text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #516EB0 |
| RGB | rgb(81, 110, 176) |
| HSL | hsl(222, 38%, 50%) |
| OKLCH | oklch(54.6% 0.109 265.1) |
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 #516EB0 | 4.99:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #516EB0 | 4.20:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #516EB0 text on white | 4.99:1 | AA | Lc 74.4 | Content text, not long reading |
| #516EB0 text on black | 4.20:1 | AA large text | Lc -27.3 | 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
#B1C1E1
oklch(80.9% 0.049 264.3)
-
Step 400
400
#89A0D2
oklch(70.7% 0.078 265.3)
-
Step 500
500
#6C88C7
oklch(63.2% 0.101 265.3)
-
Step 600
600 (this color)
#516EB0
oklch(54.6% 0.109 265.1)
-
Step 700
700
#445E9A
oklch(49% 0.102 265.2)
-
Step 800
800
#384D7D
oklch(42.6% 0.084 265.1)
-
Step 900
900
#304164
oklch(37.8% 0.064 263.8)
-
Step 950
950
#1C263B
oklch(27% 0.042 264.3)
#516EB0 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) | #5474B3 | 0.018 |
| Deuteranopia (no green cones) | #486CAF | 0.013 |
| Tritanopia (no blue cones) | #1F7C86 | 0.098 |
| Achromatopsia (no color) | #6F6F6F | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516EB0
#516EB0
oklch(54.6% 0.109 265.1)
- #8D6A0A
#8D6A0A
oklch(54.5% 0.109 85)
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 #516EB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.030
- Windows Blue #3778BF ΔE 0.037
- Muted Blue #3B719F ΔE 0.039
- Dull Blue #49759C ΔE 0.043
- Mid Blue #276AB3 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.053
- Cerulean #457B9D ΔE 0.055
Use #516EB0 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.