#1C1923
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.02 298.5), rgb(28, 25, 35).
Aa
White text reads best on this color (17.31:1).
About this color
#1C1923 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.31:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.31:1 |
Values
| HEX | #1C1923 |
| RGB | rgb(28, 25, 35) |
| HSL | hsl(258, 17%, 12%) |
| OKLCH | oklch(22.1% 0.02 298.5) |
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 #1C1923 | 17.31:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #1C1923 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #1C1923 text on white | 17.31:1 | AAA | Lc 104.2 | Preferred for body text |
| #1C1923 text on black | 1.21:1 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E1
oklch(88.4% 0.014 299.8)
-
Step 300
300
#C2BECE
oklch(81% 0.023 297.3)
-
Step 400
400
#A39CB5
oklch(70.7% 0.037 298.3)
-
Step 500
500
#8D84A3
oklch(63.2% 0.047 298.3)
-
Step 600
600
#776D8E
oklch(55.6% 0.052 298.6)
-
Step 700
700
#645B79
oklch(49.1% 0.048 298.4)
-
Step 800
800
#524A62
oklch(42.6% 0.04 300)
-
Step 900
900
#443E50
oklch(37.7% 0.031 300.1)
-
Step 950
950 (this color)
#1C1923
oklch(22.1% 0.02 298.5)
#1C1923 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) | #171A23 | 0.010 |
| Deuteranopia (no green cones) | #171A23 | 0.010 |
| Tritanopia (no blue cones) | #1B1A1C | 0.016 |
| Achromatopsia (no color) | #1A1A1A | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1923
#1C1923
oklch(22.1% 0.02 298.5)
- #1A1C12
#1A1C12
oklch(22.1% 0.019 117.2)
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 #1C1923, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Dark #1B2431 ΔE 0.041
- Jet #212529 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.056
- Rich Navy #001219 ΔE 0.062
- Almost Black #070D0D ΔE 0.073
- Dark Brown #341C02 ΔE 0.075
- Very Dark Purple #2A0134 ΔE 0.081
Use #1C1923 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.