#101B1F
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.018 222.5), rgb(16, 27, 31).
Aa
White text reads best on this color (17.52:1).
About this color
#101B1F is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 17.52:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.52:1 |
Values
| HEX | #101B1F |
| RGB | rgb(16, 27, 31) |
| HSL | hsl(196, 32%, 9%) |
| OKLCH | oklch(21.4% 0.018 222.5) |
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 #101B1F | 17.52:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #101B1F | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #101B1F text on white | 17.52:1 | AAA | Lc 104.3 | Preferred for body text |
| #101B1F 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D1DBDF
oklch(88.5% 0.012 223.5)
-
Step 300
300
#B3C4CA
oklch(80.9% 0.02 220.9)
-
Step 400
400
#8BA6B0
oklch(70.8% 0.033 222.3)
-
Step 500
500
#6D909C
oklch(63.1% 0.043 220.9)
-
Step 600
600
#557A87
oklch(55.7% 0.046 221.8)
-
Step 700
700
#456673
oklch(49% 0.043 224.5)
-
Step 800
800
#39545D
oklch(42.8% 0.036 220.7)
-
Step 900
900
#31454C
oklch(37.6% 0.028 221.5)
-
Step 950
950 (this color)
#101B1F
oklch(21.4% 0.018 222.5)
#101B1F 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) | #191A1F | 0.015 |
| Deuteranopia (no green cones) | #16191F | 0.012 |
| Tritanopia (no blue cones) | #0B1C1C | 0.011 |
| Achromatopsia (no color) | #191919 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B1F
#101B1F
oklch(21.4% 0.018 222.5)
- #201713
#201713
oklch(21.4% 0.017 45.2)
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 #101B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Rich Navy #001219 ΔE 0.047
- Dark #1B2431 ΔE 0.047
- Jet #212529 ΔE 0.050
- Almost Black #070D0D ΔE 0.062
- Oxford Blue #1B263B ΔE 0.064
- Dark Brown #341C02 ΔE 0.081
- Navy Blue #001146 ΔE 0.090
Use #101B1F 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.