#101B22
Closest named color: Rich Black (#0D1B2A). oklch(21.5% 0.021 237), rgb(16, 27, 34).
Aa
White text reads best on this color (17.47:1).
About this color
#101B22 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.016 away. White text reads best on it, at 17.47:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.47:1 |
Values
| HEX | #101B22 |
| RGB | rgb(16, 27, 34) |
| HSL | hsl(203, 36%, 10%) |
| OKLCH | oklch(21.5% 0.021 237) |
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 #101B22 | 17.47:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #101B22 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #101B22 text on white | 17.47:1 | AAA | Lc 104.3 | Preferred for body text |
| #101B22 text on black | 1.20:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B2C3CF
oklch(80.8% 0.025 238.5)
-
Step 400
400
#8AA5B7
oklch(70.8% 0.04 237.3)
-
Step 500
500
#6C8FA5
oklch(63.2% 0.051 236.2)
-
Step 600
600
#547990
oklch(55.7% 0.055 236.4)
-
Step 700
700
#44657A
oklch(49% 0.051 237.1)
-
Step 800
800
#385364
oklch(42.8% 0.043 236.8)
-
Step 900
900
#314451
oklch(37.6% 0.033 238.7)
-
Step 950
950 (this color)
#101B22
oklch(21.5% 0.021 237)
#101B22 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) | #181B22 | 0.013 |
| Deuteranopia (no green cones) | #151922 | 0.010 |
| Tritanopia (no blue cones) | #091D1D | 0.017 |
| Achromatopsia (no color) | #1A1A1A | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B22
#101B22
oklch(21.5% 0.021 237)
- #211710
#211710
oklch(21.5% 0.021 56.3)
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 #101B22, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.016
- Dark #1B2431 ΔE 0.044
- Rich Navy #001219 ΔE 0.048
- Jet #212529 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.060
- Almost Black #070D0D ΔE 0.064
- Navy Blue #001146 ΔE 0.084
- Dark Brown #341C02 ΔE 0.084
Use #101B22 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.