#5172BE
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.124 265), rgb(81, 114, 190).
Aa
White text reads best on this color (4.66:1).
About this color
#5172BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.124 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.027 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #5172BE |
| RGB | rgb(81, 114, 190) |
| HSL | hsl(222, 46%, 53%) |
| OKLCH | oklch(56.3% 0.124 265) |
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 #5172BE | 4.66:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #5172BE | 4.50:1 | AA | Lc 31.8 | Non-text elements, placeholder text |
| #5172BE text on white | 4.66:1 | AA | Lc 72.2 | Content text, not long reading |
| #5172BE text on black | 4.50:1 | AA | Lc -29.4 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E6
oklch(81% 0.056 264.7)
-
Step 400
400
#85A0D9
oklch(70.7% 0.089 264.7)
-
Step 500
500
#6787CF
oklch(63% 0.115 265.1)
-
Step 600
600 (this color)
#5172BE
oklch(56.3% 0.124 265)
-
Step 700
700
#405DA2
oklch(49% 0.116 265.2)
-
Step 800
800
#354C83
oklch(42.6% 0.096 265.4)
-
Step 900
900
#2E4069
oklch(37.7% 0.074 265.1)
-
Step 950
950
#1B263E
oklch(27.1% 0.048 264.7)
#5172BE 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) | #5279C1 | 0.019 |
| Deuteranopia (no green cones) | #4470BC | 0.016 |
| Tritanopia (no blue cones) | #00838F | 0.111 |
| Achromatopsia (no color) | #747474 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5172BE
#5172BE
oklch(56.3% 0.124 265)
- #946F00
#946F00
oklch(56.3% 0.115 85.4)
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 #5172BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.027
- French Blue #436BAD ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.051
- Cool Blue #4984B8 ΔE 0.053
- Muted Blue #3B719F ΔE 0.056
- Nice Blue #107AB0 ΔE 0.056
Use #5172BE 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.