#291B55
Closest named color: Dark Indigo (#1F0954). oklch(27.7% 0.1 289.3), rgb(41, 27, 85).
Aa
White text reads best on this color (15.19:1).
About this color
#291B55 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.100 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.045 away. White text reads best on it, at 15.19:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.38:1 |
| White text | 15.19:1 |
Values
| HEX | #291B55 |
| RGB | rgb(41, 27, 85) |
| HSL | hsl(254, 52%, 22%) |
| OKLCH | oklch(27.7% 0.1 289.3) |
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 #291B55 | 15.19:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #291B55 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #291B55 text on white | 15.19:1 | AAA | Lc 101.8 | Preferred for body text |
| #291B55 text on black | 1.38:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FF
oklch(93.7% 0.032 289.6)
-
Step 200
200
#D7D3FF
oklch(88.4% 0.06 289.3)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9F8CFF
oklch(70.7% 0.164 289.1)
-
Step 500
500
#8B69FF
oklch(63.1% 0.213 289.3)
-
Step 600
600
#7A3BFF
oklch(55.6% 0.264 289.4)
-
Step 700
700
#672ADE
oklch(49.1% 0.245 289.2)
-
Step 800
800
#5427B3
oklch(42.8% 0.202 289.5)
-
Step 900
900
#44288E
oklch(37.8% 0.158 289.1)
-
Step 950
950 (this color)
#291B55
oklch(27.7% 0.1 289.3)
#291B55 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) | #002757 | 0.056 |
| Deuteranopia (no green cones) | #002454 | 0.055 |
| Tritanopia (no blue cones) | #1B2935 | 0.082 |
| Achromatopsia (no color) | #262626 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #291B55
#291B55
oklch(27.7% 0.1 289.3)
- #2B2A00
#2B2A00
oklch(27.7% 0.06 108.4)
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 #291B55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.045
- Midnight Blue #191970 ΔE 0.057
- Dark Purple #35063E ΔE 0.064
- Marine #042E60 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.069
- Deep Purple #36013F ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.075
Use #291B55 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.