#5177BC
Closest named color: Windows Blue (#3778BF). oklch(57.3% 0.115 261.6), rgb(81, 119, 188).
Aa
Black text reads best on this color (4.71:1).
About this color
#5177BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.115 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.024 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #5177BC |
| RGB | rgb(81, 119, 188) |
| HSL | hsl(219, 44%, 53%) |
| OKLCH | oklch(57.3% 0.115 261.6) |
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 #5177BC | 4.45:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #5177BC | 4.71:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #5177BC text on white | 4.45:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #5177BC text on black | 4.71:1 | AA | Lc -30.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC1E3
oklch(80.8% 0.053 262.1)
-
Step 400
400
#84A1D5
oklch(70.7% 0.083 261.8)
-
Step 500
500
#6589CA
oklch(63.1% 0.107 261.7)
-
Step 600
600 (this color)
#5177BC
oklch(57.3% 0.115 261.6)
-
Step 700
700
#3D5F9D
oklch(49% 0.107 261.5)
-
Step 800
800
#334E7F
oklch(42.7% 0.088 261.5)
-
Step 900
900
#2D4166
oklch(37.7% 0.069 262)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#5177BC 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) | #5B7DBF | 0.022 |
| Deuteranopia (no green cones) | #4D73BB | 0.013 |
| Tritanopia (no blue cones) | #008690 | 0.104 |
| Achromatopsia (no color) | #777777 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5177BC
#5177BC
oklch(57.3% 0.115 261.6)
- #9A700A
#9A700A
oklch(57.3% 0.115 81.7)
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 #5177BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.024
- Steel Blue #4682B4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.040
- French Blue #436BAD ΔE 0.043
- Off Blue #5684AE ΔE 0.048
- Nice Blue #107AB0 ΔE 0.051
- Dull Blue #49759C ΔE 0.052
Use #5177BC 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.