#516FDE
Closest named color: Royal Blue (#4169E1). oklch(57.7% 0.172 269.1), rgb(81, 111, 222).
Aa
Black text reads best on this color (4.67:1).
About this color
#516FDE is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.172 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.025 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.67:1 |
| White text | 4.48:1 |
Values
| HEX | #516FDE |
| RGB | rgb(81, 111, 222) |
| HSL | hsl(227, 68%, 59%) |
| OKLCH | oklch(57.7% 0.172 269.1) |
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 #516FDE | 4.48:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #516FDE | 4.67:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #516FDE text on white | 4.48:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #516FDE text on black | 4.67:1 | AA | Lc -30.8 | Non-text elements, placeholder text |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ACBFF4
oklch(80.9% 0.078 269.3)
-
Step 400
400
#819CEE
oklch(70.6% 0.124 269.2)
-
Step 500
500
#6381E8
oklch(63% 0.158 269.3)
-
Step 600
600 (this color)
#516FDE
oklch(57.7% 0.172 269.1)
-
Step 700
700
#3D56BA
oklch(49.1% 0.16 269.2)
-
Step 800
800
#324797
oklch(42.7% 0.133 269)
-
Step 900
900
#2C3C78
oklch(37.6% 0.104 269.6)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#516FDE 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) | #317EE2 | 0.043 |
| Deuteranopia (no green cones) | #0271DC | 0.049 |
| Tritanopia (no blue cones) | #00899C | 0.145 |
| Achromatopsia (no color) | #777777 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516FDE
#516FDE
oklch(57.7% 0.172 269.1)
- #967500
#967500
oklch(57.8% 0.118 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 #516FDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.025
- Dark Periwinkle #665FD1 ΔE 0.046
- Neon Blue #4361EE ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.053
- Cornflower #6A79F7 ΔE 0.056
- Clear Blue #247AFD ΔE 0.058
- Warm Blue #4B57DB ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.060
Use #516FDE 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.