#17172B
Closest named color: Rich Black (#0D1B2A). oklch(21.6% 0.039 282.6), rgb(23, 23, 43).
Aa
White text reads best on this color (17.58:1).
About this color
#17172B is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.039 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.58:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.58:1 |
Values
| HEX | #17172B |
| RGB | rgb(23, 23, 43) |
| HSL | hsl(240, 30%, 13%) |
| OKLCH | oklch(21.6% 0.039 282.6) |
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 #17172B | 17.58:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #17172B | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #17172B text on white | 17.58:1 | AAA | Lc 104.4 | Preferred for body text |
| #17172B text on black | 1.19:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EA
oklch(88.4% 0.026 283.4)
-
Step 300
300
#BCBDDE
oklch(80.8% 0.046 283.9)
-
Step 400
400
#999BCE
oklch(70.6% 0.074 282.6)
-
Step 500
500
#8182C1
oklch(63.1% 0.094 282.7)
-
Step 600
600
#6B6BAD
oklch(55.7% 0.101 282.6)
-
Step 700
700
#595995
oklch(49.1% 0.095 282.3)
-
Step 800
800
#494979
oklch(42.8% 0.079 282.6)
-
Step 900
900
#3D3D61
oklch(37.7% 0.061 283.1)
-
Step 950
950 (this color)
#17172B
oklch(21.6% 0.039 282.6)
#17172B 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) | #101A2C | 0.014 |
| Deuteranopia (no green cones) | #10182B | 0.012 |
| Tritanopia (no blue cones) | #111B1E | 0.035 |
| Achromatopsia (no color) | #191919 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17172B
#17172B
oklch(21.6% 0.039 282.6)
- #1D1A03
#1D1A03
oklch(21.5% 0.04 102.5)
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 #17172B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.055
- Jet #212529 ΔE 0.056
- Rich Navy #001219 ΔE 0.059
- Navy Blue #001146 ΔE 0.067
- Midnight Purple #280137 ΔE 0.071
- Very Dark Purple #2A0134 ΔE 0.071
Use #17172B 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.