#0A191A
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.021 201.2), rgb(10, 25, 26).
Aa
White text reads best on this color (17.99:1).
About this color
#0A191A is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 17.99:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.99:1 |
Values
| HEX | #0A191A |
| RGB | rgb(10, 25, 26) |
| HSL | hsl(184, 44%, 7%) |
| OKLCH | oklch(20.1% 0.021 201.2) |
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 #0A191A | 17.99:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #0A191A | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #0A191A text on white | 17.99:1 | AAA | Lc 104.7 | Preferred for body text |
| #0A191A text on black | 1.16:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AFC6C7
oklch(81% 0.025 199.9)
-
Step 400
400
#85A8AB
oklch(70.7% 0.038 202.8)
-
Step 500
500
#659396
oklch(63.1% 0.05 201.1)
-
Step 600
600
#4B7D80
oklch(55.6% 0.054 200.6)
-
Step 700
700
#3C6A6D
oklch(49.3% 0.051 201)
-
Step 800
800
#325658
oklch(42.7% 0.042 200.3)
-
Step 900
900
#2C4749
oklch(37.7% 0.033 201.8)
-
Step 950
950 (this color)
#0A191A
oklch(20.1% 0.021 201.2)
#0A191A 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) | #17181A | 0.021 |
| Deuteranopia (no green cones) | #14161A | 0.018 |
| Tritanopia (no blue cones) | #041A19 | 0.009 |
| Achromatopsia (no color) | #171717 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A191A
#0A191A
oklch(20.1% 0.021 201.2)
- #1F1212
#1F1212
oklch(20% 0.022 19.2)
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 #0A191A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Rich Navy #001219 ΔE 0.035
- Almost Black #070D0D ΔE 0.049
- Dark #1B2431 ΔE 0.062
- Jet #212529 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.078
- Dark Brown #341C02 ΔE 0.088
- Very Dark Brown #1D0200 ΔE 0.089
Use #0A191A 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.