#1B1C28
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.023 280.7), rgb(27, 28, 40).
Aa
White text reads best on this color (16.88:1).
About this color
#1B1C28 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.88:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.88:1 |
Values
| HEX | #1B1C28 |
| RGB | rgb(27, 28, 40) |
| HSL | hsl(235, 19%, 13%) |
| OKLCH | oklch(23.1% 0.023 280.7) |
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 #1B1C28 | 16.88:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #1B1C28 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #1B1C28 text on white | 16.88:1 | AAA | Lc 103.8 | Preferred for body text |
| #1B1C28 text on black | 1.24:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D7D8E3
oklch(88.5% 0.015 281.9)
-
Step 300
300
#BDBFD3
oklch(80.9% 0.028 281.2)
-
Step 400
400
#9B9EBC
oklch(70.7% 0.044 280.7)
-
Step 500
500
#8386AB
oklch(63.1% 0.056 281.1)
-
Step 600
600
#6C6F97
oklch(55.5% 0.062 280.8)
-
Step 700
700
#5A5D81
oklch(49% 0.058 280.3)
-
Step 800
800
#4A4C69
oklch(42.7% 0.048 281.1)
-
Step 900
900
#3E4055
oklch(37.8% 0.036 280.3)
-
Step 950
950 (this color)
#1B1C28
oklch(23.1% 0.023 280.7)
#1B1C28 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) | #191D29 | 0.005 |
| Deuteranopia (no green cones) | #181C28 | 0.005 |
| Tritanopia (no blue cones) | #181E20 | 0.020 |
| Achromatopsia (no color) | #1D1D1D | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1C28
#1B1C28
oklch(23.1% 0.023 280.7)
- #1F1E11
#1F1E11
oklch(23.2% 0.023 104.3)
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 #1B1C28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.029
- Jet #212529 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.044
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.075
- Dark Brown #341C02 ΔE 0.077
- Almost Black #070D0D ΔE 0.082
Use #1B1C28 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.