#101D1A
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.019 178.3), rgb(16, 29, 26).
Aa
White text reads best on this color (17.31:1).
About this color
#101D1A is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.035 away. White text reads best on it, at 17.31:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.31:1 |
Values
| HEX | #101D1A |
| RGB | rgb(16, 29, 26) |
| HSL | hsl(166, 29%, 9%) |
| OKLCH | oklch(21.7% 0.019 178.3) |
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 #101D1A | 17.31:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #101D1A | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #101D1A text on white | 17.31:1 | AAA | Lc 104.2 | Preferred for body text |
| #101D1A text on black | 1.21:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B2C6C1
oklch(81% 0.023 179)
-
Step 400
400
#89A8A1
oklch(70.6% 0.036 180)
-
Step 500
500
#6B938A
oklch(63.1% 0.046 179.3)
-
Step 600
600
#527D73
oklch(55.5% 0.05 178.1)
-
Step 700
700
#426A61
oklch(49.2% 0.048 178.4)
-
Step 800
800
#37564F
oklch(42.7% 0.039 178.6)
-
Step 900
900
#304742
oklch(37.7% 0.03 179.6)
-
Step 950
950 (this color)
#101D1A
oklch(21.7% 0.019 178.3)
#101D1A 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) | #1C1B1A | 0.021 |
| Deuteranopia (no green cones) | #1A1A1A | 0.019 |
| Tritanopia (no blue cones) | #0C1D1C | 0.006 |
| Achromatopsia (no color) | #1A1A1A | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D1A
#101D1A
oklch(21.7% 0.019 178.3)
- #22161A
#22161A
oklch(21.7% 0.021 357.2)
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 #101D1A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.035
- Jet #212529 ΔE 0.048
- Dark #1B2431 ΔE 0.051
- Rich Navy #001219 ΔE 0.053
- Almost Black #070D0D ΔE 0.066
- Oxford Blue #1B263B ΔE 0.068
- Dark Brown #341C02 ΔE 0.074
- Dark Forest Green #002D04 ΔE 0.079
Use #101D1A 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.