#17151C
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.014 298.2), rgb(23, 21, 28).
Aa
White text reads best on this color (18.09:1).
About this color
#17151C is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 18.09:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.09:1 |
Values
| HEX | #17151C |
| RGB | rgb(23, 21, 28) |
| HSL | hsl(257, 14%, 10%) |
| OKLCH | oklch(20.1% 0.014 298.2) |
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 #17151C | 18.09:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #17151C | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #17151C text on white | 18.09:1 | AAA | Lc 104.8 | Preferred for body text |
| #17151C 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#DAD8DF
oklch(88.6% 0.01 299.2)
-
Step 300
300
#C2BECA
oklch(80.8% 0.017 301.2)
-
Step 400
400
#A29DAF
oklch(70.6% 0.026 298.4)
-
Step 500
500
#8C859C
oklch(63.1% 0.035 299.3)
-
Step 600
600
#766F87
oklch(55.7% 0.038 298.5)
-
Step 700
700
#635D72
oklch(49.2% 0.034 298.2)
-
Step 800
800
#514C5D
oklch(42.8% 0.028 298.6)
-
Step 900
900
#433F4C
oklch(37.7% 0.022 299.4)
-
Step 950
950 (this color)
#17151C
oklch(20.1% 0.014 298.2)
#17151C 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) | #14161C | 0.007 |
| Deuteranopia (no green cones) | #14161C | 0.007 |
| Tritanopia (no blue cones) | #161617 | 0.012 |
| Achromatopsia (no color) | #161616 | 0.014 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #17151C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Rich Navy #001219 ΔE 0.045
- Almost Black #070D0D ΔE 0.052
- Dark #1B2431 ΔE 0.060
- Jet #212529 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.075
- Very Dark Brown #1D0200 ΔE 0.076
- Dark Brown #341C02 ΔE 0.082
Use #17151C 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.