#311D43
Closest named color: Space Cadet (#2B2D42). oklch(27.6% 0.071 306.6), rgb(49, 29, 67).
Aa
White text reads best on this color (15.13:1).
About this color
#311D43 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.071 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.050 away. White text reads best on it, at 15.13:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.071) |
| Temperature | in between |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.38:1 |
| White text | 15.13:1 |
Values
| HEX | #311D43 |
| RGB | rgb(49, 29, 67) |
| HSL | hsl(272, 40%, 19%) |
| OKLCH | oklch(27.6% 0.071 306.6) |
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 #311D43 | 15.13:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #311D43 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #311D43 text on white | 15.13:1 | AAA | Lc 101.9 | Preferred for body text |
| #311D43 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E1D2F2
oklch(88.6% 0.046 306.6)
-
Step 300
300
#CEB3EC
oklch(80.9% 0.084 306.1)
-
Step 400
400
#B689E2
oklch(70.7% 0.134 306.5)
-
Step 500
500
#A468DA
oklch(63% 0.173 306.4)
-
Step 600
600
#904CC7
oklch(55.6% 0.187 306.8)
-
Step 700
700
#7A3CAC
oklch(49% 0.174 306.5)
-
Step 800
800
#64338B
oklch(42.8% 0.143 307)
-
Step 900
900
#512E6F
oklch(37.7% 0.111 306.7)
-
Step 950
950 (this color)
#311D43
oklch(27.6% 0.071 306.6)
#311D43 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) | #122544 | 0.055 |
| Deuteranopia (no green cones) | #182642 | 0.049 |
| Tritanopia (no blue cones) | #2E242C | 0.054 |
| Achromatopsia (no color) | #262626 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311D43
#311D43
oklch(27.6% 0.071 306.6)
- #1F2E00
#1F2E00
oklch(27.7% 0.071 126.5)
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 #311D43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.050
- Dark Purple #35063E ΔE 0.050
- Oxford Blue #1B263B ΔE 0.051
- Eggplant #380835 ΔE 0.052
- Aubergine #3D0734 ΔE 0.056
- Eggplant Purple #430541 ΔE 0.058
- Deep Purple #36013F ΔE 0.059
- Dark #1B2431 ΔE 0.060
Use #311D43 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.