#17131F
Closest named color: Rich Black (#0D1B2A). oklch(19.8% 0.024 299.5), rgb(23, 19, 31).
Aa
White text reads best on this color (18.27:1).
About this color
#17131F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 18.27:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.27:1 |
Values
| HEX | #17131F |
| RGB | rgb(23, 19, 31) |
| HSL | hsl(260, 24%, 10%) |
| OKLCH | oklch(19.8% 0.024 299.5) |
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 #17131F | 18.27:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #17131F | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #17131F text on white | 18.27:1 | AAA | Lc 104.9 | Preferred for body text |
| #17131F text on black | 1.14:1 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C3BDD1
oklch(80.9% 0.029 299.4)
-
Step 400
400
#A49BBA
oklch(70.7% 0.046 298.5)
-
Step 500
500
#8E82A9
oklch(63.1% 0.059 298.8)
-
Step 600
600
#796B94
oklch(55.6% 0.064 300)
-
Step 700
700
#65597E
oklch(49% 0.06 299.1)
-
Step 800
800
#534966
oklch(42.7% 0.049 300.2)
-
Step 900
900
#443D53
oklch(37.6% 0.038 299.1)
-
Step 950
950 (this color)
#17131F
oklch(19.8% 0.024 299.5)
#17131F 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) | #10151F | 0.014 |
| Deuteranopia (no green cones) | #11151F | 0.013 |
| Tritanopia (no blue cones) | #161517 | 0.020 |
| Achromatopsia (no color) | #151515 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17131F
#17131F
oklch(19.8% 0.024 299.5)
- #14170A
#14170A
oklch(19.7% 0.025 119.3)
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 #17131F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Rich Navy #001219 ΔE 0.045
- Almost Black #070D0D ΔE 0.053
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.077
- Very Dark Brown #1D0200 ΔE 0.077
- Very Dark Purple #2A0134 ΔE 0.077
Use #17131F 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.