#311E57
Closest named color: Dark Indigo (#1F0954). oklch(29.3% 0.099 295), rgb(49, 30, 87).
Aa
White text reads best on this color (14.44:1).
About this color
#311E57 is a dark, moderately saturated purple. In OKLCH its lightness is 29%, its chroma 0.099 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 0.062 away. White text reads best on it, at 14.44:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.45:1 |
| White text | 14.44:1 |
Values
| HEX | #311E57 |
| RGB | rgb(49, 30, 87) |
| HSL | hsl(260, 49%, 23%) |
| OKLCH | oklch(29.3% 0.099 295) |
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 #311E57 | 14.44:1 | AAA | Lc -103.9 | Preferred for body text |
| Black text on #311E57 | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #311E57 text on white | 14.44:1 | AAA | Lc 100.9 | Preferred for body text |
| #311E57 text on black | 1.45:1 | 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
#DBD2FF
oklch(88.5% 0.062 294.3)
-
Step 300
300
#C5B3FF
oklch(80.9% 0.107 294.8)
-
Step 400
400
#AA87FF
oklch(70.7% 0.172 295.1)
-
Step 500
500
#9761FF
oklch(63.1% 0.224 294.9)
-
Step 600
600
#8537F6
oklch(55.6% 0.259 294.9)
-
Step 700
700
#7125D7
oklch(49.1% 0.242 294.7)
-
Step 800
800
#5C23AD
oklch(42.6% 0.199 295.1)
-
Step 900
900
#4B2589
oklch(37.7% 0.156 295.2)
-
Step 950
950 (this color)
#311E57
oklch(29.3% 0.099 295)
#311E57 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) | #002A59 | 0.066 |
| Deuteranopia (no green cones) | #022956 | 0.065 |
| Tritanopia (no blue cones) | #272B37 | 0.078 |
| Achromatopsia (no color) | #2A2A2A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311E57
#311E57
oklch(29.3% 0.099 295)
- #2B3000
#2B3000
oklch(29.4% 0.067 115.9)
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 #311E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.064
- Midnight Blue #191970 ΔE 0.065
- Dark Purple #35063E ΔE 0.066
- Marine #042E60 ΔE 0.067
- Deep Violet #490648 ΔE 0.069
- Eggplant Purple #430541 ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.070
Use #311E57 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.