#101B19
Closest named color: Rich Black (#0D1B2A). oklch(21.1% 0.016 182.2), rgb(16, 27, 25).
Aa
White text reads best on this color (17.60:1).
About this color
#101B19 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 0.034 away. White text reads best on it, at 17.60:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.60:1 |
Values
| HEX | #101B19 |
| RGB | rgb(16, 27, 25) |
| HSL | hsl(169, 26%, 8%) |
| OKLCH | oklch(21.1% 0.016 182.2) |
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 #101B19 | 17.60:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #101B19 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #101B19 text on white | 17.60:1 | AAA | Lc 104.4 | Preferred for body text |
| #101B19 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBD9
oklch(88.4% 0.01 181.4)
-
Step 300
300
#B4C5C1
oklch(80.9% 0.019 180.1)
-
Step 400
400
#8CA7A2
oklch(70.6% 0.031 183)
-
Step 500
500
#6F928B
oklch(63.2% 0.04 181.3)
-
Step 600
600
#577C75
oklch(55.6% 0.043 181.6)
-
Step 700
700
#476862
oklch(49% 0.039 182.1)
-
Step 800
800
#3B5550
oklch(42.7% 0.033 181.5)
-
Step 900
900
#324643
oklch(37.6% 0.026 184.7)
-
Step 950
950 (this color)
#101B19
oklch(21.1% 0.016 182.2)
#101B19 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) | #1A1A19 | 0.017 |
| Deuteranopia (no green cones) | #181819 | 0.017 |
| Tritanopia (no blue cones) | #0D1B1A | 0.004 |
| Achromatopsia (no color) | #191919 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B19
#101B19
oklch(21.1% 0.016 182.2)
- #1F1518
#1F1518
oklch(21% 0.017 358.9)
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 #101B19, 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 0.047
- Jet #212529 ΔE 0.054
- Dark #1B2431 ΔE 0.055
- Almost Black #070D0D ΔE 0.059
- Oxford Blue #1B263B ΔE 0.072
- Dark Brown #341C02 ΔE 0.076
- Dark Forest Green #002D04 ΔE 0.085
Use #101B19 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.