#5B4791
Closest named color: Twilight (#4E518B). oklch(45.5% 0.118 293.7), rgb(91, 71, 145).
Aa
White text reads best on this color (7.62:1).
About this color
#5B4791 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.118 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 7.62:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #5B4791 |
| RGB | rgb(91, 71, 145) |
| HSL | hsl(256, 34%, 42%) |
| OKLCH | oklch(45.5% 0.118 293.7) |
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 #5B4791 | 7.62:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #5B4791 | 2.75:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #5B4791 text on white | 7.62:1 | AAA | Lc 86.3 | Fine for body text |
| #5B4791 text on black | 2.75:1 | Fails | Lc -15.8 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F1
oklch(88.6% 0.038 293.8)
-
Step 300
300
#C2B9E9
oklch(80.9% 0.068 293.4)
-
Step 400
400
#A493DF
oklch(70.7% 0.11 293.7)
-
Step 500
500
#8F76D6
oklch(63.1% 0.142 293.9)
-
Step 600
600
#795DC3
oklch(55.5% 0.153 293.4)
-
Step 700
700
#664CA8
oklch(49% 0.142 293.5)
-
Step 800
800 (this color)
#5B4791
oklch(45.5% 0.118 293.7)
-
Step 900
900
#45366D
oklch(37.7% 0.092 294.1)
-
Step 950
950
#282040
oklch(27% 0.059 293.6)
#5B4791 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) | #2B5494 | 0.069 |
| Deuteranopia (no green cones) | #2F528F | 0.066 |
| Tritanopia (no blue cones) | #4E5665 | 0.096 |
| Achromatopsia (no color) | #545454 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B4791
#5B4791
oklch(45.5% 0.118 293.7)
- #575C00
#575C00
oklch(45.5% 0.102 113.4)
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 #5B4791, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Blueberry #464196 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.044
- Rebecca Purple #663399 ΔE 0.051
- Dusk #4E5481 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.068
- Dusty Grape #545775 ΔE 0.072
Use #5B4791 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.