#1B151E
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.02 314.4), rgb(27, 21, 30).
Aa
White text reads best on this color (17.90:1).
About this color
#1B151E is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.034 away. White text reads best on it, at 17.90:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.90:1 |
Values
| HEX | #1B151E |
| RGB | rgb(27, 21, 30) |
| HSL | hsl(280, 18%, 10%) |
| OKLCH | oklch(20.7% 0.02 314.4) |
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 #1B151E | 17.90:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #1B151E | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #1B151E text on white | 17.90:1 | AAA | Lc 104.7 | Preferred for body text |
| #1B151E 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE8ED
oklch(93.5% 0.007 312.3)
-
Step 200
200
#DCD7DF
oklch(88.5% 0.012 313.2)
-
Step 300
300
#C6BCCB
oklch(80.8% 0.023 314.7)
-
Step 400
400
#A99AB1
oklch(70.7% 0.037 314)
-
Step 500
500
#94819E
oklch(63% 0.048 314)
-
Step 600
600
#7F6A89
oklch(55.5% 0.053 314.8)
-
Step 700
700
#6B5974
oklch(49.2% 0.048 314.4)
-
Step 800
800
#57495E
oklch(42.8% 0.038 314.4)
-
Step 900
900
#483D4D
oklch(37.8% 0.03 315.3)
-
Step 950
950 (this color)
#1B151E
oklch(20.7% 0.02 314.4)
#1B151E 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) | #14171E | 0.015 |
| Deuteranopia (no green cones) | #15171E | 0.013 |
| Tritanopia (no blue cones) | #1B1618 | 0.014 |
| Achromatopsia (no color) | #171717 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B151E
#1B151E
oklch(20.7% 0.02 314.4)
- #141A11
#141A11
oklch(20.8% 0.02 135.3)
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 #1B151E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.034
- Rich Navy #001219 ΔE 0.054
- Dark #1B2431 ΔE 0.056
- Jet #212529 ΔE 0.058
- Almost Black #070D0D ΔE 0.061
- Oxford Blue #1B263B ΔE 0.071
- Very Dark Brown #1D0200 ΔE 0.078
- Dark Brown #341C02 ΔE 0.079
Use #1B151E 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.