#171239
Closest named color: Navy Blue (#001146). oklch(21.5% 0.073 284.3), rgb(23, 18, 57).
Aa
White text reads best on this color (17.76:1).
About this color
#171239 is a very dark, moderately saturated purple. In OKLCH its lightness is 22%, its chroma 0.073 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.044 away. White text reads best on it, at 17.76:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.18:1 |
| White text | 17.76:1 |
Values
| HEX | #171239 |
| RGB | rgb(23, 18, 57) |
| HSL | hsl(248, 52%, 15%) |
| OKLCH | oklch(21.5% 0.073 284.3) |
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 #171239 | 17.76:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #171239 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #171239 text on white | 17.76:1 | AAA | Lc 104.4 | Preferred for body text |
| #171239 text on black | 1.18:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D5D6F8
oklch(88.6% 0.047 284.1)
-
Step 300
300
#BABAF7
oklch(81% 0.086 284.3)
-
Step 400
400
#9793F3
oklch(70.7% 0.138 284.2)
-
Step 500
500
#8075EE
oklch(63.1% 0.176 284.3)
-
Step 600
600
#6B5ADD
oklch(55.6% 0.192 284.1)
-
Step 700
700
#5A49BF
oklch(49.1% 0.177 284.3)
-
Step 800
800
#493D9B
oklch(42.7% 0.147 284.1)
-
Step 900
900
#3D357B
oklch(37.7% 0.115 284.7)
-
Step 950
950 (this color)
#171239
oklch(21.5% 0.073 284.3)
#171239 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) | #00193A | 0.036 |
| Deuteranopia (no green cones) | #001738 | 0.036 |
| Tritanopia (no blue cones) | #0A1B23 | 0.061 |
| Achromatopsia (no color) | #181818 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171239
#171239
oklch(21.5% 0.073 284.3)
- #1D1A00
#1D1A00
oklch(21.4% 0.045 103.7)
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 #171239, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.047
- Midnight Purple #280137 ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.054
- Very Dark Purple #2A0134 ΔE 0.057
- Night Blue #040348 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.065
- Dark #1B2431 ΔE 0.065
Use #171239 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.