#4F537B
Closest named color: Dusk (#4E5481). oklch(45.6% 0.065 279.1), rgb(79, 83, 123).
Aa
White text reads best on this color (7.35:1).
About this color
#4F537B is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.065 and its hue 279°. 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 7.35:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.85:1 |
| White text | 7.35:1 |
Values
| HEX | #4F537B |
| RGB | rgb(79, 83, 123) |
| HSL | hsl(235, 22%, 40%) |
| OKLCH | oklch(45.6% 0.065 279.1) |
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 #4F537B | 7.35:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #4F537B | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #4F537B text on white | 7.35:1 | AAA | Lc 85.5 | Fine for body text |
| #4F537B text on black | 2.85:1 | Fails | Lc -16.5 | 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
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E7
oklch(88.5% 0.021 279.9)
-
Step 300
300
#BBBFDA
oklch(81% 0.038 278.8)
-
Step 400
400
#989DC7
oklch(70.7% 0.062 279.4)
-
Step 500
500
#7F85B8
oklch(63.1% 0.077 278.8)
-
Step 600
600
#696EA4
oklch(55.6% 0.084 279.2)
-
Step 700
700
#575C8D
oklch(49.2% 0.078 278.6)
-
Step 800
800 (this color)
#4F537B
oklch(45.6% 0.065 279.1)
-
Step 900
900
#3C3F5C
oklch(37.8% 0.05 279.2)
-
Step 950
950
#232536
oklch(27% 0.032 278.9)
#4F537B 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) | #47587D | 0.017 |
| Deuteranopia (no green cones) | #44547A | 0.016 |
| Tritanopia (no blue cones) | #435B61 | 0.059 |
| Achromatopsia (no color) | #565656 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F537B
#4F537B
oklch(45.6% 0.065 279.1)
- #60582A
#60582A
oklch(45.7% 0.066 99.6)
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 #4F537B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.010
- Dusty Grape #545775 ΔE 0.020
- Twilight #4E518B ΔE 0.029
- YInMn Blue #415A77 ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.047
- Denim #3B638C ΔE 0.051
Use #4F537B 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.