#101F17
Closest named color: Rich Black (#0D1B2A). oklch(22.3% 0.026 160), rgb(16, 31, 23).
Aa
White text reads best on this color (17.06:1).
About this color
#101F17 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 17.06:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.06:1 |
Values
| HEX | #101F17 |
| RGB | rgb(16, 31, 23) |
| HSL | hsl(148, 32%, 9%) |
| OKLCH | oklch(22.3% 0.026 160) |
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 #101F17 | 17.06:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #101F17 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #101F17 text on white | 17.06:1 | AAA | Lc 103.9 | Preferred for body text |
| #101F17 text on black | 1.23:1 | 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
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E5ECE8
oklch(93.7% 0.009 161.3)
-
Step 200
200
#D0DDD5
oklch(88.5% 0.018 159.1)
-
Step 300
300
#B0C7BA
oklch(80.9% 0.031 160.9)
-
Step 400
400
#86AB96
oklch(70.8% 0.051 159.9)
-
Step 500
500
#67967C
oklch(63.2% 0.064 159.6)
-
Step 600
600
#4E8065
oklch(55.6% 0.069 159.5)
-
Step 700
700
#3E6C54
oklch(49.1% 0.064 160)
-
Step 800
800
#345845
oklch(42.7% 0.053 160)
-
Step 900
900
#2E483A
oklch(37.6% 0.04 160.1)
-
Step 950
950 (this color)
#101F17
oklch(22.3% 0.026 160)
#101F17 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) | #1F1D17 | 0.026 |
| Deuteranopia (no green cones) | #1C1B17 | 0.024 |
| Tritanopia (no blue cones) | #0D1F1D | 0.012 |
| Achromatopsia (no color) | #1C1C1C | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101F17
#101F17
oklch(22.3% 0.026 160)
- #24161F
#24161F
oklch(22.2% 0.028 340.8)
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 #101F17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.045
- Jet #212529 ΔE 0.048
- Dark #1B2431 ΔE 0.054
- Rich Navy #001219 ΔE 0.062
- Dark Forest Green #002D04 ΔE 0.068
- Dark Brown #341C02 ΔE 0.069
- Very Dark Green #062E03 ΔE 0.071
- Oxford Blue #1B263B ΔE 0.072
Use #101F17 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.