#1C181F
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.015 310.7), rgb(28, 24, 31).
Aa
White text reads best on this color (17.50:1).
About this color
#1C181F is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.031 away. White text reads best on it, at 17.50:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.50:1 |
Values
| HEX | #1C181F |
| RGB | rgb(28, 24, 31) |
| HSL | hsl(274, 13%, 11%) |
| OKLCH | oklch(21.7% 0.015 310.7) |
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 #1C181F | 17.50:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #1C181F | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #1C181F text on white | 17.50:1 | AAA | Lc 104.3 | Preferred for body text |
| #1C181F text on black | 1.19:1 | 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
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DBD7DE
oklch(88.4% 0.01 311.2)
-
Step 300
300
#C4BEC9
oklch(81% 0.017 310.1)
-
Step 400
400
#A69CAE
oklch(70.7% 0.028 310.3)
-
Step 500
500
#90849A
oklch(63.1% 0.035 309.7)
-
Step 600
600
#7B6D85
oklch(55.6% 0.04 311.1)
-
Step 700
700
#675B70
oklch(49% 0.036 310.6)
-
Step 800
800
#544B5B
oklch(42.8% 0.028 310.3)
-
Step 900
900
#453E4B
oklch(37.6% 0.024 309.4)
-
Step 950
950 (this color)
#1C181F
oklch(21.7% 0.015 310.7)
#1C181F 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) | #17191F | 0.010 |
| Deuteranopia (no green cones) | #181A1F | 0.010 |
| Tritanopia (no blue cones) | #1C191A | 0.012 |
| Achromatopsia (no color) | #191919 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #1C181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.031
- Dark #1B2431 ΔE 0.047
- Jet #212529 ΔE 0.047
- Rich Navy #001219 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.063
- Almost Black #070D0D ΔE 0.068
- Dark Brown #341C02 ΔE 0.072
- Very Dark Purple #2A0134 ΔE 0.084
Use #1C181F 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.