#5166A0
Closest named color: French Blue (#436BAD). oklch(52% 0.096 267.9), rgb(81, 102, 160).
Aa
White text reads best on this color (5.58:1).
About this color
#5166A0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.096 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.026 away. White text reads best on it, at 5.58:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.75:1 |
| White text | 5.58:1 |
Values
| HEX | #5166A0 |
| RGB | rgb(81, 102, 160) |
| HSL | hsl(224, 33%, 47%) |
| OKLCH | oklch(52% 0.096 267.9) |
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 #5166A0 | 5.58:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #5166A0 | 3.75:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #5166A0 text on white | 5.58:1 | AA | Lc 77.8 | Fine for body text |
| #5166A0 text on black | 3.75:1 | AA large text | Lc -23.9 | 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 700.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B4C0DF
oklch(80.9% 0.046 268.6)
-
Step 400
400
#8D9FD0
oklch(70.7% 0.075 268.8)
-
Step 500
500
#7187C3
oklch(63.1% 0.094 268.2)
-
Step 600
600
#5970B0
oklch(55.6% 0.104 268)
-
Step 700
700 (this color)
#5166A0
oklch(52% 0.096 267.9)
-
Step 800
800
#3C4D7A
oklch(42.7% 0.078 267.4)
-
Step 900
900
#334063
oklch(37.7% 0.063 267.8)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#5166A0 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) | #506CA2 | 0.017 |
| Deuteranopia (no green cones) | #48659F | 0.012 |
| Tritanopia (no blue cones) | #31727B | 0.086 |
| Achromatopsia (no color) | #686868 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5166A0
#5166A0
oklch(52% 0.096 267.9)
- #80651A
#80651A
oklch(52% 0.096 87.8)
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 #5166A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.026
- Dusky Blue #475F94 ΔE 0.030
- Muted Blue #3B719F ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.039
- Denim #3B638C ΔE 0.044
- Dull Blue #49759C ΔE 0.046
- Mid Blue #276AB3 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.048
Use #5166A0 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.