#516BE7
Closest named color: Royal Blue (#4169E1). oklch(57.6% 0.189 270.5), rgb(81, 107, 231).
Aa
Black text reads best on this color (4.60:1).
About this color
#516BE7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.189 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.021 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.60:1 |
| White text | 4.55:1 |
Values
| HEX | #516BE7 |
| RGB | rgb(81, 107, 231) |
| HSL | hsl(230, 76%, 61%) |
| OKLCH | oklch(57.6% 0.189 270.5) |
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 #516BE7 | 4.55:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #516BE7 | 4.60:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #516BE7 text on white | 4.55:1 | AA | Lc 71.3 | Content text, not long reading |
| #516BE7 text on black | 4.60:1 | AA | Lc -30.4 | 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
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBEF9
oklch(80.8% 0.086 270.6)
-
Step 400
400
#809BF5
oklch(70.7% 0.135 270)
-
Step 500
500
#637FF1
oklch(63.2% 0.173 270.4)
-
Step 600
600 (this color)
#516BE7
oklch(57.6% 0.189 270.5)
-
Step 700
700
#3D53C3
oklch(49.2% 0.176 270.2)
-
Step 800
800
#32449D
oklch(42.6% 0.146 270.4)
-
Step 900
900
#2C3B7D
oklch(37.8% 0.113 270.5)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#516BE7 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) | #0C7DEB | 0.056 |
| Deuteranopia (no green cones) | #006FE4 | 0.049 |
| Tritanopia (no blue cones) | #00899F | 0.157 |
| Achromatopsia (no color) | #767676 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516BE7
#516BE7
oklch(57.6% 0.189 270.5)
- #947500
#947500
oklch(57.6% 0.118 90.2)
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 #516BE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.021
- Neon Blue #4361EE ΔE 0.032
- Dark Periwinkle #665FD1 ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.051
- Clear Blue #247AFD ΔE 0.053
- Cornflower #6A79F7 ΔE 0.054
- Medium Slate Blue #7B68EE ΔE 0.058
Use #516BE7 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.