#170E21
Closest named color: Rich Black (#0D1B2A). oklch(18.6% 0.039 304.7), rgb(23, 14, 33).
Aa
White text reads best on this color (18.72:1).
About this color
#170E21 is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.039 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 0.046 away. White text reads best on it, at 18.72:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.039) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.72:1 |
Values
| HEX | #170E21 |
| RGB | rgb(23, 14, 33) |
| HSL | hsl(268, 40%, 9%) |
| OKLCH | oklch(18.6% 0.039 304.7) |
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 #170E21 | 18.72:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #170E21 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #170E21 text on white | 18.72:1 | AAA | Lc 105.2 | Preferred for body text |
| #170E21 text on black | 1.12:1 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F1
oklch(93.7% 0.013 306)
-
Step 200
200
#DDD5E7
oklch(88.5% 0.026 305.8)
-
Step 300
300
#C7BADA
oklch(81% 0.047 303.8)
-
Step 400
400
#AB95C7
oklch(70.7% 0.076 304.6)
-
Step 500
500
#977AB8
oklch(63% 0.096 305.2)
-
Step 600
600
#8163A4
oklch(55.6% 0.103 304.5)
-
Step 700
700
#6D528D
oklch(49.2% 0.096 304.2)
-
Step 800
800
#594372
oklch(42.7% 0.08 304.8)
-
Step 900
900
#49395C
oklch(37.7% 0.061 304.6)
-
Step 950
950 (this color)
#170E21
oklch(18.6% 0.039 304.7)
#170E21 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) | #091222 | 0.028 |
| Deuteranopia (no green cones) | #0B1220 | 0.026 |
| Tritanopia (no blue cones) | #151115 | 0.030 |
| Achromatopsia (no color) | #121212 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #170E21
#170E21
oklch(18.6% 0.039 304.7)
- #0F1603
#0F1603
oklch(18.7% 0.039 125.4)
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 #170E21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.046
- Rich Navy #001219 ΔE 0.050
- Almost Black #070D0D ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.066
- Midnight Purple #280137 ΔE 0.066
- Midnight #03012D ΔE 0.074
- Dark Navy #000435 ΔE 0.075
- Very Dark Brown #1D0200 ΔE 0.075
Use #170E21 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.