#5377BB
Closest named color: Windows Blue (#3778BF). oklch(57.3% 0.113 262.2), rgb(83, 119, 187).
Aa
Black text reads best on this color (4.72:1).
About this color
#5377BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.113 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.027 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #5377BB |
| RGB | rgb(83, 119, 187) |
| HSL | hsl(219, 43%, 53%) |
| OKLCH | oklch(57.3% 0.113 262.2) |
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 #5377BB | 4.44:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #5377BB | 4.72:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #5377BB text on white | 4.44:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #5377BB text on black | 4.72:1 | AA | Lc -31.0 | 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
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC1E2
oklch(80.8% 0.051 262.6)
-
Step 400
400
#85A1D4
oklch(70.7% 0.081 262.2)
-
Step 500
500
#6789C9
oklch(63.2% 0.104 262.4)
-
Step 600
600 (this color)
#5377BB
oklch(57.3% 0.113 262.2)
-
Step 700
700
#3F5F9C
oklch(49.1% 0.105 262.3)
-
Step 800
800
#344E7F
oklch(42.8% 0.088 262.1)
-
Step 900
900
#2D4166
oklch(37.7% 0.069 262)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#5377BB 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) | #5B7DBE | 0.020 |
| Deuteranopia (no green cones) | #4F73BA | 0.013 |
| Tritanopia (no blue cones) | #118690 | 0.102 |
| Achromatopsia (no color) | #787878 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5377BB
#5377BB
oklch(57.3% 0.113 262.2)
- #997111
#997111
oklch(57.4% 0.113 82.6)
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 #5377BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.027
- Steel Blue #4682B4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.041
- French Blue #436BAD ΔE 0.044
- Off Blue #5684AE ΔE 0.047
- Dull Blue #49759C ΔE 0.051
- Nice Blue #107AB0 ΔE 0.052
Use #5377BB 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.