#1F1734
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.055 294.4), rgb(31, 23, 52).
Aa
White text reads best on this color (17.06:1).
About this color
#1F1734 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.055 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 17.06:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.055) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.06:1 |
Values
| HEX | #1F1734 |
| RGB | rgb(31, 23, 52) |
| HSL | hsl(257, 39%, 15%) |
| OKLCH | oklch(23.1% 0.055 294.4) |
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 #1F1734 | 17.06:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #1F1734 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #1F1734 text on white | 17.06:1 | AAA | Lc 103.9 | Preferred for body text |
| #1F1734 text on black | 1.23:1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5EF
oklch(88.5% 0.036 294.5)
-
Step 300
300
#C3B9E7
oklch(80.9% 0.065 294.9)
-
Step 400
400
#A494DB
oklch(70.7% 0.103 293.9)
-
Step 500
500
#8F77D1
oklch(63% 0.133 294.5)
-
Step 600
600
#7A5FBE
oklch(55.7% 0.144 294.4)
-
Step 700
700
#674EA4
oklch(49.2% 0.134 294.4)
-
Step 800
800
#544085
oklch(42.7% 0.111 294.6)
-
Step 900
900
#45376B
oklch(37.8% 0.087 294.2)
-
Step 950
950 (this color)
#1F1734
oklch(23.1% 0.055 294.4)
#1F1734 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) | #0D1C35 | 0.032 |
| Deuteranopia (no green cones) | #0E1B33 | 0.031 |
| Tritanopia (no blue cones) | #1A1D23 | 0.045 |
| Achromatopsia (no color) | #1C1C1C | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1734
#1F1734
oklch(23.1% 0.055 294.4)
- #1D2000
#1D2000
oklch(23.2% 0.053 114.7)
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 #1F1734, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.048
- Midnight Purple #280137 ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.058
- Jet #212529 ΔE 0.058
- Dark Purple #35063E ΔE 0.062
- Eggplant #380835 ΔE 0.062
Use #1F1734 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.