#170921
Closest named color: Rich Navy (#001219). oklch(17.5% 0.051 309.1), rgb(23, 9, 33).
Aa
White text reads best on this color (19.13:1).
About this color
#170921 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.051 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.058 away. White text reads best on it, at 19.13:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.051) |
| Temperature | in between |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.13:1 |
Values
| HEX | #170921 |
| RGB | rgb(23, 9, 33) |
| HSL | hsl(275, 57%, 8%) |
| OKLCH | oklch(17.5% 0.051 309.1) |
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 #170921 | 19.13:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #170921 | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #170921 text on white | 19.13:1 | AAA | Lc 105.4 | Preferred for body text |
| #170921 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EA
oklch(88.5% 0.032 308.1)
-
Step 300
300
#CCB7DF
oklch(81% 0.06 308.7)
-
Step 400
400
#B290CE
oklch(70.7% 0.096 309.1)
-
Step 500
500
#9F73C1
oklch(63% 0.123 309.2)
-
Step 600
600
#8A5BAE
oklch(55.7% 0.133 308.8)
-
Step 700
700
#754A95
oklch(49.1% 0.124 309)
-
Step 800
800
#5F3D79
oklch(42.6% 0.103 308.8)
-
Step 900
900
#4E3561
oklch(37.7% 0.078 309.2)
-
Step 950
950 (this color)
#170921
oklch(17.5% 0.051 309.1)
#170921 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) | #040F22 | 0.041 |
| Deuteranopia (no green cones) | #070F20 | 0.037 |
| Tritanopia (no blue cones) | #160D13 | 0.035 |
| Achromatopsia (no color) | #0F0F0F | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #170921
#170921
oklch(17.5% 0.051 309.1)
- #0A1400
#0A1400
oklch(17.5% 0.046 128.8)
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 #170921, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.058
- Almost Black #070D0D ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.061
- Midnight Purple #280137 ΔE 0.061
- Midnight #03012D ΔE 0.066
- Dark Navy #000435 ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.072
Use #170921 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.