#1D1740
Closest named color: Dark Indigo (#1F0954). oklch(23.8% 0.075 285.9), rgb(29, 23, 64).
Aa
White text reads best on this color (16.81:1).
About this color
#1D1740 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.075 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.047 away. White text reads best on it, at 16.81:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.24:1 |
| White text | 16.81:1 |
Values
| HEX | #1D1740 |
| RGB | rgb(29, 23, 64) |
| HSL | hsl(249, 47%, 17%) |
| OKLCH | oklch(23.8% 0.075 285.9) |
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 #1D1740 | 16.81:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #1D1740 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #1D1740 text on white | 16.81:1 | AAA | Lc 103.6 | Preferred for body text |
| #1D1740 text on black | 1.24:1 | 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
#F4F4FD
oklch(97% 0.012 286.2)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5F9
oklch(88.5% 0.049 286.6)
-
Step 300
300
#BBB9F8
oklch(81% 0.088 285.7)
-
Step 400
400
#9A92F5
oklch(70.8% 0.142 285.9)
-
Step 500
500
#8373F0
oklch(63.1% 0.181 285.8)
-
Step 600
600
#6F57DF
oklch(55.6% 0.198 286.1)
-
Step 700
700
#5D46C1
oklch(49% 0.183 286.1)
-
Step 800
800
#4C3B9C
oklch(42.7% 0.151 286.2)
-
Step 900
900
#3E347C
oklch(37.7% 0.118 285.6)
-
Step 950
950 (this color)
#1D1740
oklch(23.8% 0.075 285.9)
#1D1740 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) | #011E41 | 0.040 |
| Deuteranopia (no green cones) | #011C3F | 0.040 |
| Tritanopia (no blue cones) | #112028 | 0.063 |
| Achromatopsia (no color) | #1D1D1D | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1740
#1D1740
oklch(23.8% 0.075 285.9)
- #222000
#222000
oklch(23.8% 0.051 106.3)
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 #1D1740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.050
- Navy Blue #001146 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.054
- Dark #1B2431 ΔE 0.056
- Midnight Purple #280137 ΔE 0.058
- Dark Purple #35063E ΔE 0.061
- Very Dark Purple #2A0134 ΔE 0.061
Use #1D1740 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.