#191F2B
Closest named color: Dark (#1B2431). oklch(23.9% 0.025 263.9), rgb(25, 31, 43).
Aa
White text reads best on this color (16.50:1).
About this color
#191F2B is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.019 away. White text reads best on it, at 16.50:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #191F2B |
| RGB | rgb(25, 31, 43) |
| HSL | hsl(220, 26%, 13%) |
| OKLCH | oklch(23.9% 0.025 263.9) |
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 #191F2B | 16.50:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #191F2B | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #191F2B text on white | 16.50:1 | AAA | Lc 103.4 | Preferred for body text |
| #191F2B 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B7C1D4
oklch(80.9% 0.029 263.4)
-
Step 400
400
#92A1BF
oklch(70.8% 0.047 264.2)
-
Step 500
500
#778AAF
oklch(63.2% 0.06 263.5)
-
Step 600
600
#60739A
oklch(55.6% 0.065 264.3)
-
Step 700
700
#4F6084
oklch(49% 0.062 264.7)
-
Step 800
800
#414F6B
oklch(42.8% 0.05 263.8)
-
Step 900
900
#374257
oklch(37.8% 0.039 263.1)
-
Step 950
950 (this color)
#191F2B
oklch(23.9% 0.025 263.9)
#191F2B 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) | #1B202C | 0.005 |
| Deuteranopia (no green cones) | #191E2B | 0.004 |
| Tritanopia (no blue cones) | #142123 | 0.021 |
| Achromatopsia (no color) | #1F1F1F | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191F2B
#191F2B
oklch(23.9% 0.025 263.9)
- #251E11
#251E11
oklch(23.9% 0.025 82.4)
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 #191F2B, 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 0.025
- Jet #212529 ΔE 0.028
- Oxford Blue #1B263B ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.077
- Dark Brown #341C02 ΔE 0.079
Use #191F2B 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.