#5176CC
Closest named color: Windows Blue (#3778BF). oklch(58% 0.139 264.9), rgb(81, 118, 204).
Aa
Black text reads best on this color (4.81:1).
About this color
#5176CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.139 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.034 away. Black text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #5176CC |
| RGB | rgb(81, 118, 204) |
| HSL | hsl(222, 55%, 56%) |
| OKLCH | oklch(58% 0.139 264.9) |
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 #5176CC | 4.36:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #5176CC | 4.81:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #5176CC text on white | 4.36:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #5176CC text on black | 4.81:1 | AA | Lc -31.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC1EA
oklch(81% 0.062 264.6)
-
Step 400
400
#829FDF
oklch(70.6% 0.1 265.2)
-
Step 500
500
#6386D7
oklch(63% 0.129 265.2)
-
Step 600
600 (this color)
#5176CC
oklch(58% 0.139 264.9)
-
Step 700
700
#3C5CA9
oklch(49.1% 0.129 265)
-
Step 800
800
#314C89
oklch(42.8% 0.106 264.4)
-
Step 900
900
#2B406E
oklch(37.8% 0.083 264.3)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#5176CC 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) | #507FCF | 0.024 |
| Deuteranopia (no green cones) | #3E74CA | 0.021 |
| Tritanopia (no blue cones) | #008997 | 0.120 |
| Achromatopsia (no color) | #797979 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5176CC
#5176CC
oklch(58% 0.139 264.9)
- #9A7300
#9A7300
oklch(57.9% 0.119 84.9)
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 #5176CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.034
- Royal Blue #4169E1 ΔE 0.053
- Cool Blue #4984B8 ΔE 0.055
- Steel Blue #4682B4 ΔE 0.056
- Water Blue #0E87CC ΔE 0.057
- French Blue #436BAD ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.062
- Dark Periwinkle #665FD1 ΔE 0.062
Use #5176CC 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.