#4B557D
Closest named color: Dusk (#4E5481). oklch(45.8% 0.067 272.8), rgb(75, 85, 125).
Aa
White text reads best on this color (7.25:1).
About this color
#4B557D is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.067 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.009 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #4B557D |
| RGB | rgb(75, 85, 125) |
| HSL | hsl(228, 25%, 39%) |
| OKLCH | oklch(45.8% 0.067 272.8) |
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 #4B557D | 7.25:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #4B557D | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #4B557D text on white | 7.25:1 | AAA | Lc 85.2 | Fine for body text |
| #4B557D text on black | 2.89:1 | Fails | Lc -16.9 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B8C0DB
oklch(81% 0.039 272.4)
-
Step 400
400
#939FC8
oklch(70.8% 0.062 272)
-
Step 500
500
#7986BA
oklch(63% 0.08 273.1)
-
Step 600
600
#6270A6
oklch(55.6% 0.086 272.3)
-
Step 700
700
#515D8F
oklch(49% 0.082 272.8)
-
Step 800
800 (this color)
#4B557D
oklch(45.8% 0.067 272.8)
-
Step 900
900
#38405D
oklch(37.7% 0.051 271.9)
-
Step 950
950
#212537
oklch(26.9% 0.034 274.3)
#4B557D 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) | #48597F | 0.012 |
| Deuteranopia (no green cones) | #44557C | 0.010 |
| Tritanopia (no blue cones) | #3C5D63 | 0.060 |
| Achromatopsia (no color) | #575757 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B557D
#4B557D
oklch(45.8% 0.067 272.8)
- #645729
#645729
oklch(45.9% 0.067 93.8)
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 #4B557D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.009
- Dusty Grape #545775 ΔE 0.021
- YInMn Blue #415A77 ΔE 0.024
- Twilight #4E518B ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Dusky Blue #475F94 ΔE 0.042
- Denim #3B638C ΔE 0.044
Use #4B557D 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.