#17212E
Closest named color: Dark (#1B2431). oklch(24.5% 0.029 255.2), rgb(23, 33, 46).
Aa
White text reads best on this color (16.23:1).
About this color
#17212E is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.013 away. White text reads best on it, at 16.23:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.23:1 |
Values
| HEX | #17212E |
| RGB | rgb(23, 33, 46) |
| HSL | hsl(214, 33%, 14%) |
| OKLCH | oklch(24.5% 0.029 255.2) |
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 #17212E | 16.23:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #17212E | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #17212E text on white | 16.23:1 | AAA | Lc 103.2 | Preferred for body text |
| #17212E text on black | 1.29:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D7
oklch(80.9% 0.035 255.2)
-
Step 400
400
#8AA3C3
oklch(70.8% 0.055 254.7)
-
Step 500
500
#6D8CB4
oklch(63.2% 0.07 255)
-
Step 600
600
#55759F
oklch(55.5% 0.076 255.5)
-
Step 700
700
#456288
oklch(49% 0.07 255.5)
-
Step 800
800
#39506F
oklch(42.6% 0.059 256.1)
-
Step 900
900
#31435A
oklch(37.8% 0.046 254.9)
-
Step 950
950 (this color)
#17212E
oklch(24.5% 0.029 255.2)
#17212E 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) | #1C222F | 0.009 |
| Deuteranopia (no green cones) | #191F2E | 0.007 |
| Tritanopia (no blue cones) | #0F2425 | 0.026 |
| Achromatopsia (no color) | #202020 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17212E
#17212E
oklch(24.5% 0.029 255.2)
- #281E10
#281E10
oklch(24.3% 0.029 75.1)
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 #17212E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.013
- Jet #212529 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.028
- Oxford Blue #1B263B ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.063
- Gunmetal #293241 ΔE 0.071
- Rich Navy #001219 ΔE 0.078
- Navy Blue #001146 ΔE 0.081
Use #17212E 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.