#311B59
Closest named color: Dark Indigo (#1F0954). oklch(29% 0.106 295.3), rgb(49, 27, 89).
Aa
White text reads best on this color (14.66:1).
About this color
#311B59 is a dark, moderately saturated purple. In OKLCH its lightness is 29%, its chroma 0.106 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.057 away. White text reads best on it, at 14.66:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.43:1 |
| White text | 14.66:1 |
Values
| HEX | #311B59 |
| RGB | rgb(49, 27, 89) |
| HSL | hsl(261, 53%, 23%) |
| OKLCH | oklch(29% 0.106 295.3) |
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 #311B59 | 14.66:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #311B59 | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #311B59 text on white | 14.66:1 | AAA | Lc 101.2 | Preferred for body text |
| #311B59 text on black | 1.43:1 | 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
#F6F4FF
oklch(97.2% 0.015 294.5)
-
Step 100
100
#EBE6FF
oklch(93.6% 0.034 294.9)
-
Step 200
200
#DCD2FF
oklch(88.6% 0.062 295.3)
-
Step 300
300
#C6B3FF
oklch(81% 0.107 295.4)
-
Step 400
400
#AA87FF
oklch(70.7% 0.172 295.1)
-
Step 500
500
#9861FF
oklch(63.2% 0.224 295.3)
-
Step 600
600
#882AFF
oklch(55.6% 0.278 295.2)
-
Step 700
700
#7413DF
oklch(49.1% 0.26 295.2)
-
Step 800
800
#5E19B4
oklch(42.7% 0.215 295.3)
-
Step 900
900
#4C208E
oklch(37.6% 0.167 295.3)
-
Step 950
950 (this color)
#311B59
oklch(29% 0.106 295.3)
#311B59 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) | #00295B | 0.069 |
| Deuteranopia (no green cones) | #002758 | 0.069 |
| Tritanopia (no blue cones) | #272937 | 0.082 |
| Achromatopsia (no color) | #282828 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311B59
#311B59
oklch(29% 0.106 295.3)
- #2A2F00
#2A2F00
oklch(29% 0.066 116)
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 #311B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.057
- Midnight Blue #191970 ΔE 0.061
- Dark Purple #35063E ΔE 0.064
- Deep Violet #490648 ΔE 0.068
- Eggplant Purple #430541 ΔE 0.069
- Deep Purple #36013F ΔE 0.069
- Royal Purple #4B006E ΔE 0.071
- Marine #042E60 ΔE 0.071
Use #311B59 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.