#1F101D
Closest named color: Rich Black (#0D1B2A). oklch(20% 0.034 331.6), rgb(31, 16, 29).
Aa
White text reads best on this color (18.25:1).
About this color
#1F101D is a very dark, muted purple. In OKLCH its lightness is 20%, its chroma 0.034 and its hue 332°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.048 away. White text reads best on it, at 18.25:1.
| Hue family | Purples |
| Lightness | very dark (20%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.25:1 |
Values
| HEX | #1F101D |
| RGB | rgb(31, 16, 29) |
| HSL | hsl(308, 32%, 9%) |
| OKLCH | oklch(20% 0.034 331.6) |
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 #1F101D | 18.25:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #1F101D | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #1F101D text on white | 18.25:1 | AAA | Lc 104.9 | Preferred for body text |
| #1F101D text on black | 1.15:1 | 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
#F8F4F7
oklch(97.1% 0.006 334)
-
Step 100
100
#EFE7ED
oklch(93.6% 0.012 334.1)
-
Step 200
200
#E2D4E0
oklch(88.5% 0.022 330.3)
-
Step 300
300
#D1B8CD
oklch(81% 0.04 331.2)
-
Step 400
400
#B992B3
oklch(70.7% 0.065 331.5)
-
Step 500
500
#A777A0
oklch(63.1% 0.082 331.7)
-
Step 600
600
#925F8B
oklch(55.6% 0.09 331.7)
-
Step 700
700
#7C4E76
oklch(49% 0.084 331.5)
-
Step 800
800
#654060
oklch(42.6% 0.07 331.6)
-
Step 900
900
#52374F
oklch(37.7% 0.054 330.5)
-
Step 950
950 (this color)
#1F101D
oklch(20% 0.034 331.6)
#1F101D 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) | #10141D | 0.033 |
| Deuteranopia (no green cones) | #13161D | 0.031 |
| Tritanopia (no blue cones) | #201115 | 0.018 |
| Achromatopsia (no color) | #151515 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F101D
#1F101D
oklch(20% 0.034 331.6)
- #091A0E
#091A0E
oklch(19.9% 0.033 151.9)
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 #1F101D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.048
- Rich Navy #001219 ΔE 0.062
- Almost Black #070D0D ΔE 0.063
- Very Dark Purple #2A0134 ΔE 0.067
- Dark #1B2431 ΔE 0.069
- Very Dark Brown #1D0200 ΔE 0.069
- Midnight Purple #280137 ΔE 0.070
- Jet #212529 ΔE 0.071
Use #1F101D 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.