#170B23
Closest named color: Rich Black (#0D1B2A). oklch(18.1% 0.049 305.1), rgb(23, 11, 35).
Aa
White text reads best on this color (18.94:1).
About this color
#170B23 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.049 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.054 away. White text reads best on it, at 18.94:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.10:1 |
| White text | 18.94:1 |
Values
| HEX | #170B23 |
| RGB | rgb(23, 11, 35) |
| HSL | hsl(270, 52%, 9%) |
| OKLCH | oklch(18.1% 0.049 305.1) |
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 #170B23 | 18.94:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #170B23 | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #170B23 text on white | 18.94:1 | AAA | Lc 105.3 | Preferred for body text |
| #170B23 text on black | 1.10:1 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DED4EB
oklch(88.5% 0.033 305.3)
-
Step 300
300
#C9B8E0
oklch(81% 0.058 304.4)
-
Step 400
400
#AE92D0
oklch(70.8% 0.094 304.8)
-
Step 500
500
#9A76C3
oklch(63.1% 0.118 304.8)
-
Step 600
600
#855DB0
oklch(55.6% 0.13 304.8)
-
Step 700
700
#714C97
oklch(49.1% 0.121 305.1)
-
Step 800
800
#5C3F7A
oklch(42.7% 0.099 305.3)
-
Step 900
900
#4B3663
oklch(37.7% 0.078 304.4)
-
Step 950
950 (this color)
#170B23
oklch(18.1% 0.049 305.1)
#170B23 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) | #051024 | 0.037 |
| Deuteranopia (no green cones) | #071122 | 0.035 |
| Tritanopia (no blue cones) | #150F15 | 0.035 |
| Achromatopsia (no color) | #111111 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #170B23
#170B23
oklch(18.1% 0.049 305.1)
- #0D1500
#0D1500
oklch(18.1% 0.046 125.4)
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 #170B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.054
- Rich Navy #001219 ΔE 0.056
- Very Dark Purple #2A0134 ΔE 0.060
- Midnight Purple #280137 ΔE 0.060
- Almost Black #070D0D ΔE 0.061
- Midnight #03012D ΔE 0.067
- Dark Navy #000435 ΔE 0.070
- Dark Navy Blue #00022E ΔE 0.072
Use #170B23 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.