#170B15
Closest named color: Almost Black (#070D0D). oklch(17.2% 0.028 332.9), rgb(23, 11, 21).
Aa
White text reads best on this color (19.17:1).
About this color
#170B15 is a very dark close to neutral grey. In OKLCH its lightness is 17%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.041 away. White text reads best on it, at 19.17:1.
| Hue family | Neutrals |
| Lightness | very dark (17%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.09:1 |
| White text | 19.17:1 |
Values
| HEX | #170B15 |
| RGB | rgb(23, 11, 21) |
| HSL | hsl(310, 35%, 7%) |
| OKLCH | oklch(17.2% 0.028 332.9) |
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 #170B15 | 19.17:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #170B15 | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #170B15 text on white | 19.17:1 | AAA | Lc 105.5 | Preferred for body text |
| #170B15 text on black | 1.09:1 | 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
#EEE8ED
oklch(93.7% 0.009 331)
-
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
#B595AF
oklch(70.7% 0.052 332.6)
-
Step 500
500
#A37A9B
oklch(63% 0.068 333.3)
-
Step 600
600
#8D6386
oklch(55.5% 0.073 332.5)
-
Step 700
700
#785272
oklch(49.1% 0.069 332.2)
-
Step 800
800
#62435C
oklch(42.7% 0.057 333.6)
-
Step 900
900
#50394C
oklch(37.8% 0.044 332.6)
-
Step 950
950 (this color)
#170B15
oklch(17.2% 0.028 332.9)
#170B15 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) | #0B0E15 | 0.027 |
| Deuteranopia (no green cones) | #0E1015 | 0.025 |
| Tritanopia (no blue cones) | #180C0F | 0.014 |
| Achromatopsia (no color) | #0F0F0F | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #170B15
#170B15
oklch(17.2% 0.028 332.9)
- #06130A
#06130A
oklch(17.1% 0.027 153.6)
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 #170B15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.041
- Rich Navy #001219 ΔE 0.049
- Very Dark Brown #1D0200 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.062
- Very Dark Purple #2A0134 ΔE 0.082
- Midnight Purple #280137 ΔE 0.084
- Midnight #03012D ΔE 0.084
- Dark Navy Blue #00022E ΔE 0.089
Use #170B15 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.