#10191C
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.014 220.4), rgb(16, 25, 28).
Aa
White text reads best on this color (17.82:1).
About this color
#10191C is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.82:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.82:1 |
Values
| HEX | #10191C |
| RGB | rgb(16, 25, 28) |
| HSL | hsl(195, 27%, 9%) |
| OKLCH | oklch(20.6% 0.014 220.4) |
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 #10191C | 17.82:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #10191C | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #10191C text on white | 17.82:1 | AAA | Lc 104.6 | Preferred for body text |
| #10191C text on black | 1.17:1 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DBDD
oklch(88.6% 0.009 214.3)
-
Step 300
300
#B5C3C8
oklch(80.8% 0.017 221.1)
-
Step 400
400
#8FA5AD
oklch(70.8% 0.027 221.7)
-
Step 500
500
#738F98
oklch(63.2% 0.034 219.3)
-
Step 600
600
#5B7983
oklch(55.7% 0.038 220.3)
-
Step 700
700
#4A666F
oklch(49.2% 0.036 219.7)
-
Step 800
800
#3D535A
oklch(42.7% 0.029 219.4)
-
Step 900
900
#34454A
oklch(37.8% 0.023 217.7)
-
Step 950
950 (this color)
#10191C
oklch(20.6% 0.014 220.4)
#10191C 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) | #17181C | 0.012 |
| Deuteranopia (no green cones) | #15171C | 0.011 |
| Tritanopia (no blue cones) | #0C1A1A | 0.009 |
| Achromatopsia (no color) | #181818 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #10191C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Rich Navy #001219 ΔE 0.041
- Almost Black #070D0D ΔE 0.054
- Dark #1B2431 ΔE 0.055
- Jet #212529 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.071
- Dark Brown #341C02 ΔE 0.083
- Very Dark Brown #1D0200 ΔE 0.088
Use #10191C 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.