#516EA1
Closest named color: Flat Blue (#3C73A8). oklch(53.8% 0.087 261.2), rgb(81, 110, 161).
Aa
White text reads best on this color (5.12:1).
About this color
#516EA1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.087 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.025 away. White text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.09:1 |
| White text | 5.12:1 |
Values
| HEX | #516EA1 |
| RGB | rgb(81, 110, 161) |
| HSL | hsl(218, 33%, 47%) |
| OKLCH | oklch(53.8% 0.087 261.2) |
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 #516EA1 | 5.12:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #516EA1 | 4.09:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #516EA1 text on white | 5.12:1 | AA | Lc 75.3 | Fine for body text |
| #516EA1 text on black | 4.09:1 | AA large text | Lc -26.5 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400
#8BA1C9
oklch(70.6% 0.064 262.3)
-
Step 500
500
#6E8ABB
oklch(63.1% 0.081 261.3)
-
Step 600
600 (this color)
#516EA1
oklch(53.8% 0.087 261.2)
-
Step 700
700
#46618F
oklch(49.2% 0.081 260.7)
-
Step 800
800
#3A4F74
oklch(42.7% 0.067 261.3)
-
Step 900
900
#32425E
oklch(37.8% 0.053 261.3)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#516EA1 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) | #5B72A3 | 0.018 |
| Deuteranopia (no green cones) | #516AA0 | 0.011 |
| Tritanopia (no blue cones) | #2E7980 | 0.078 |
| Achromatopsia (no color) | #6E6E6E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516EA1
#516EA1
oklch(53.8% 0.087 261.2)
- #88682C
#88682C
oklch(53.7% 0.087 80.6)
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 #516EA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.025
- Muted Blue #3B719F ΔE 0.025
- Dull Blue #49759C ΔE 0.025
- French Blue #436BAD ΔE 0.028
- Metallic Blue #4F738E ΔE 0.038
- Cerulean #457B9D ΔE 0.041
- Stormy Blue #507B9C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.048
Use #516EA1 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.