#311D41
Closest named color: Oxford Blue (#1B263B). oklch(27.5% 0.068 308.2), rgb(49, 29, 65).
Aa
White text reads best on this color (15.18:1).
About this color
#311D41 is a dark, muted purple. In OKLCH its lightness is 27%, its chroma 0.068 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.049 away. White text reads best on it, at 15.18:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.18:1 |
Values
| HEX | #311D41 |
| RGB | rgb(49, 29, 65) |
| HSL | hsl(273, 38%, 18%) |
| OKLCH | oklch(27.5% 0.068 308.2) |
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 #311D41 | 15.18:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #311D41 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #311D41 text on white | 15.18:1 | AAA | Lc 102.0 | Preferred for body text |
| #311D41 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E1D2F1
oklch(88.5% 0.045 307.2)
-
Step 300
300
#CFB3E9
oklch(80.9% 0.08 308.2)
-
Step 400
400
#B789DE
oklch(70.6% 0.13 308.3)
-
Step 500
500
#A569D5
oklch(63% 0.166 308)
-
Step 600
600
#914EC2
oklch(55.6% 0.179 308.3)
-
Step 700
700
#7B3EA8
oklch(49.1% 0.167 307.9)
-
Step 800
800
#643488
oklch(42.7% 0.138 307.9)
-
Step 900
900
#522E6D
oklch(37.7% 0.109 308.4)
-
Step 950
950 (this color)
#311D41
oklch(27.5% 0.068 308.2)
#311D41 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) | #142542 | 0.053 |
| Deuteranopia (no green cones) | #192640 | 0.049 |
| Tritanopia (no blue cones) | #2F232C | 0.048 |
| Achromatopsia (no color) | #262626 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311D41
#311D41
oklch(27.5% 0.068 308.2)
- #1E2E03
#1E2E03
oklch(27.7% 0.068 128.1)
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 #311D41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.049
- Eggplant #380835 ΔE 0.051
- Dark Purple #35063E ΔE 0.051
- Aubergine #3D0734 ΔE 0.054
- Dark #1B2431 ΔE 0.058
- Eggplant Purple #430541 ΔE 0.058
- Deep Purple #36013F ΔE 0.059
Use #311D41 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.