#1D1731
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.05 292.6), rgb(29, 23, 49).
Aa
White text reads best on this color (17.22:1).
About this color
#1D1731 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.050 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.034 away. White text reads best on it, at 17.22:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.050) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.22:1 |
Values
| HEX | #1D1731 |
| RGB | rgb(29, 23, 49) |
| HSL | hsl(254, 36%, 14%) |
| OKLCH | oklch(22.6% 0.05 292.6) |
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 #1D1731 | 17.22:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #1D1731 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #1D1731 text on white | 17.22:1 | AAA | Lc 104.0 | Preferred for body text |
| #1D1731 text on black | 1.21:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D6ED
oklch(88.5% 0.031 291.7)
-
Step 300
300
#C1BAE4
oklch(80.8% 0.059 292.7)
-
Step 400
400
#A296D6
oklch(70.7% 0.093 292.5)
-
Step 500
500
#8C7BCB
oklch(63.2% 0.119 292.4)
-
Step 600
600
#7762B8
oklch(55.6% 0.131 292.9)
-
Step 700
700
#64519F
oklch(49.1% 0.122 292.6)
-
Step 800
800
#514381
oklch(42.8% 0.1 292)
-
Step 900
900
#433967
oklch(37.7% 0.077 292.3)
-
Step 950
950 (this color)
#1D1731
oklch(22.6% 0.05 292.6)
#1D1731 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) | #0F1B32 | 0.026 |
| Deuteranopia (no green cones) | #0F1B30 | 0.026 |
| Tritanopia (no blue cones) | #181C21 | 0.041 |
| Achromatopsia (no color) | #1B1B1B | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1731
#1D1731
oklch(22.6% 0.05 292.6)
- #1D1E00
#1D1E00
oklch(22.6% 0.05 111.5)
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 #1D1731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.034
- Dark #1B2431 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.049
- Jet #212529 ΔE 0.056
- Midnight Purple #280137 ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.061
- Navy Blue #001146 ΔE 0.066
- Eggplant #380835 ΔE 0.067
Use #1D1731 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.