#1F131D
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.027 332.5), rgb(31, 19, 29).
Aa
White text reads best on this color (17.96:1).
About this color
#1F131D is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.96:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.96:1 |
Values
| HEX | #1F131D |
| RGB | rgb(31, 19, 29) |
| HSL | hsl(310, 24%, 10%) |
| OKLCH | oklch(20.7% 0.027 332.5) |
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 #1F131D | 17.96:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #1F131D | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #1F131D text on white | 17.96:1 | AAA | Lc 104.7 | Preferred for body text |
| #1F131D text on black | 1.16:1 | 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
#F7F4F7
oklch(97% 0.005 325.6)
-
Step 100
100
#EEE8EC
oklch(93.7% 0.008 337.4)
-
Step 200
200
#E1D5DE
oklch(88.5% 0.018 334.2)
-
Step 300
300
#CEB9CA
oklch(80.9% 0.033 332.2)
-
Step 400
400
#B495AF
oklch(70.6% 0.051 331.6)
-
Step 500
500
#A27B9B
oklch(63.1% 0.066 332.7)
-
Step 600
600
#8C6486
oklch(55.6% 0.071 331.8)
-
Step 700
700
#775371
oklch(49.1% 0.065 332.5)
-
Step 800
800
#61445C
oklch(42.7% 0.054 332.7)
-
Step 900
900
#4F394B
oklch(37.6% 0.042 332.9)
-
Step 950
950 (this color)
#1F131D
oklch(20.7% 0.027 332.5)
#1F131D 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) | #13161D | 0.026 |
| Deuteranopia (no green cones) | #16171D | 0.022 |
| Tritanopia (no blue cones) | #201417 | 0.014 |
| Achromatopsia (no color) | #171717 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F131D
#1F131D
oklch(20.7% 0.027 332.5)
- #0E1B12
#0E1B12
oklch(20.7% 0.026 153.5)
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 #1F131D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Dark #1B2431 ΔE 0.061
- Rich Navy #001219 ΔE 0.061
- Jet #212529 ΔE 0.062
- Almost Black #070D0D ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.073
- Very Dark Brown #1D0200 ΔE 0.073
- Oxford Blue #1B263B ΔE 0.075
Use #1F131D 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.