#4F5591
Closest named color: Twilight (#4E518B). oklch(47.3% 0.097 277.7), rgb(79, 85, 145).
Aa
White text reads best on this color (6.90:1).
About this color
#4F5591 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.097 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.014 away. White text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.04:1 |
| White text | 6.90:1 |
Values
| HEX | #4F5591 |
| RGB | rgb(79, 85, 145) |
| HSL | hsl(235, 29%, 44%) |
| OKLCH | oklch(47.3% 0.097 277.7) |
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 #4F5591 | 6.90:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #4F5591 | 3.04:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #4F5591 text on white | 6.90:1 | AA | Lc 83.8 | Fine for body text |
| #4F5591 text on black | 3.04:1 | AA large text | Lc -18.2 | 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 700.
-
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
#D5D8EB
oklch(88.6% 0.026 278.7)
-
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
#7B84C3
oklch(63.2% 0.095 277.1)
-
Step 600
600
#656CAF
oklch(55.5% 0.104 277.9)
-
Step 700
700 (this color)
#4F5591
oklch(47.3% 0.097 277.7)
-
Step 800
800
#454A7A
oklch(42.7% 0.079 277.9)
-
Step 900
900
#3A3E62
oklch(37.7% 0.062 278.2)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#4F5591 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) | #3F5D93 | 0.028 |
| Deuteranopia (no green cones) | #3A5790 | 0.028 |
| Tritanopia (no blue cones) | #39616C | 0.084 |
| Achromatopsia (no color) | #5A5A5A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F5591
#4F5591
oklch(47.3% 0.097 277.7)
- #6A5B02
#6A5B02
oklch(47.2% 0.097 97.9)
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 #4F5591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.014
- Dusk #4E5481 ΔE 0.026
- Dusky Blue #475F94 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.045
- Denim #3B638C ΔE 0.048
- Dusty Grape #545775 ΔE 0.048
- Dusk Blue #26538D ΔE 0.051
Use #4F5591 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.