#516BC1
Closest named color: French Blue (#436BAD). oklch(55% 0.137 268.9), rgb(81, 107, 193).
Aa
White text reads best on this color (4.97:1).
About this color
#516BC1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.137 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.036 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #516BC1 |
| RGB | rgb(81, 107, 193) |
| HSL | hsl(226, 47%, 54%) |
| OKLCH | oklch(55% 0.137 268.9) |
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 #516BC1 | 4.97:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #516BC1 | 4.22:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #516BC1 text on white | 4.97:1 | AA | Lc 74.2 | Content text, not long reading |
| #516BC1 text on black | 4.22:1 | AA large text | Lc -27.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0C0E9
oklch(80.9% 0.061 268.3)
-
Step 400
400
#879EDF
oklch(70.7% 0.099 268.9)
-
Step 500
500
#6A85D6
oklch(63.2% 0.126 268.7)
-
Step 600
600 (this color)
#516BC1
oklch(55% 0.137 268.9)
-
Step 700
700
#435AA8
oklch(49% 0.128 269)
-
Step 800
800
#374A88
oklch(42.6% 0.105 268.8)
-
Step 900
900
#303E6D
oklch(37.6% 0.083 269.6)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#516BC1 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) | #4475C4 | 0.028 |
| Deuteranopia (no green cones) | #356BBF | 0.029 |
| Tritanopia (no blue cones) | #007E8C | 0.122 |
| Achromatopsia (no color) | #707070 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516BC1
#516BC1
oklch(55% 0.137 268.9)
- #8C6D00
#8C6D00
oklch(55% 0.112 88.9)
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 #516BC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.036
- Windows Blue #3778BF ΔE 0.041
- Mid Blue #276AB3 ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.048
- Iris #6258C4 ΔE 0.051
- Royal Blue #4169E1 ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.056
Use #516BC1 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.