#171F2E
Closest named color: Dark (#1B2431). oklch(23.9% 0.031 262.6), rgb(23, 31, 46).
Aa
White text reads best on this color (16.51:1).
About this color
#171F2E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.031 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.019 away. White text reads best on it, at 16.51:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #171F2E |
| RGB | rgb(23, 31, 46) |
| HSL | hsl(219, 33%, 14%) |
| OKLCH | oklch(23.9% 0.031 262.6) |
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 #171F2E | 16.51:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #171F2E | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #171F2E text on white | 16.51:1 | AAA | Lc 103.4 | Preferred for body text |
| #171F2E text on black | 1.27:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E7
oklch(88.4% 0.021 264.5)
-
Step 300
300
#B4C1D9
oklch(80.9% 0.037 262.8)
-
Step 400
400
#8DA1C6
oklch(70.7% 0.059 262.6)
-
Step 500
500
#718AB8
oklch(63.2% 0.075 262.3)
-
Step 600
600
#5973A4
oklch(55.6% 0.083 262.5)
-
Step 700
700
#49608C
oklch(49% 0.076 262.7)
-
Step 800
800
#3C4F72
oklch(42.8% 0.063 262.1)
-
Step 900
900
#33425C
oklch(37.8% 0.049 261.1)
-
Step 950
950 (this color)
#171F2E
oklch(23.9% 0.031 262.6)
#171F2E 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) | #1A202F | 0.007 |
| Deuteranopia (no green cones) | #171E2E | 0.004 |
| Tritanopia (no blue cones) | #0F2224 | 0.028 |
| Achromatopsia (no color) | #1F1F1F | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171F2E
#171F2E
oklch(23.9% 0.031 262.6)
- #261E0D
#261E0D
oklch(24% 0.031 84.9)
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 #171F2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.019
- Rich Black #0D1B2A ΔE 0.023
- Jet #212529 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.067
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.076
- Navy Blue #001146 ΔE 0.077
Use #171F2E 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.