#1B170F
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.016 84.4), rgb(27, 23, 15).
Aa
White text reads best on this color (17.85:1).
About this color
#1B170F is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.053 away. White text reads best on it, at 17.85:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.85:1 |
Values
| HEX | #1B170F |
| RGB | rgb(27, 23, 15) |
| HSL | hsl(40, 29%, 8%) |
| OKLCH | oklch(20.7% 0.016 84.4) |
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 #1B170F | 17.85:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #1B170F | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #1B170F text on white | 17.85:1 | AAA | Lc 104.6 | Preferred for body text |
| #1B170F text on black | 1.17:1 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE6
oklch(93.7% 0.005 95.1)
-
Step 200
200
#DCD9D1
oklch(88.5% 0.011 89.7)
-
Step 300
300
#C6C0B3
oklch(80.9% 0.019 86.2)
-
Step 400
400
#AA9F8B
oklch(70.6% 0.031 82.6)
-
Step 500
500
#95886F
oklch(63.2% 0.039 83.7)
-
Step 600
600
#7F7257
oklch(55.7% 0.043 85.2)
-
Step 700
700
#6B5F47
oklch(49% 0.039 84.4)
-
Step 800
800
#574E3A
oklch(42.7% 0.033 86.6)
-
Step 900
900
#484132
oklch(37.8% 0.026 85.9)
-
Step 950
950 (this color)
#1B170F
oklch(20.7% 0.016 84.4)
#1B170F 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) | #19170E | 0.005 |
| Deuteranopia (no green cones) | #1A180F | 0.004 |
| Tritanopia (no blue cones) | #1D1615 | 0.014 |
| Achromatopsia (no color) | #171717 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B170F
#1B170F
oklch(20.7% 0.016 84.4)
- #14181F
#14181F
oklch(20.8% 0.015 261.6)
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 #1B170F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.053
- Almost Black #070D0D ΔE 0.059
- Rich Navy #001219 ΔE 0.059
- Jet #212529 ΔE 0.061
- Dark Brown #341C02 ΔE 0.061
- Dark #1B2431 ΔE 0.068
- Very Dark Brown #1D0200 ΔE 0.072
- Oxford Blue #1B263B ΔE 0.086
Use #1B170F 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.