#4B5181
Closest named color: Dusk (#4E5481). oklch(45.2% 0.079 277.3), rgb(75, 81, 129).
Aa
White text reads best on this color (7.51:1).
About this color
#4B5181 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.079 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.010 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #4B5181 |
| RGB | rgb(75, 81, 129) |
| HSL | hsl(233, 26%, 40%) |
| OKLCH | oklch(45.2% 0.079 277.3) |
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 #4B5181 | 7.51:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #4B5181 | 2.79:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #4B5181 text on white | 7.51:1 | AAA | Lc 86.1 | Fine for body text |
| #4B5181 text on black | 2.79:1 | Fails | Lc -16.0 | 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 800.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B9BEDF
oklch(80.8% 0.047 278.5)
-
Step 400
400
#959DCF
oklch(70.8% 0.074 277.3)
-
Step 500
500
#7B84C2
oklch(63.1% 0.094 277)
-
Step 600
600
#656DAE
oklch(55.7% 0.101 277.2)
-
Step 700
700
#545B96
oklch(49.2% 0.094 277.2)
-
Step 800
800 (this color)
#4B5181
oklch(45.2% 0.079 277.3)
-
Step 900
900
#3A3E62
oklch(37.7% 0.062 278.2)
-
Step 950
950
#222539
oklch(27.1% 0.037 277)
#4B5181 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) | #415783 | 0.020 |
| Deuteranopia (no green cones) | #3D5380 | 0.020 |
| Tritanopia (no blue cones) | #3A5B63 | 0.070 |
| Achromatopsia (no color) | #545454 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5181
#4B5181
oklch(45.2% 0.079 277.3)
- #62561B
#62561B
oklch(45.3% 0.079 97.6)
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 #4B5181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.010
- Twilight #4E518B ΔE 0.017
- Dusty Grape #545775 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.045
- Dusk Blue #26538D ΔE 0.046
Use #4B5181 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.