#100B19
Closest named color: Almost Black (#070D0D). oklch(16.4% 0.03 299.6), rgb(16, 11, 25).
Aa
White text reads best on this color (19.37:1).
About this color
#100B19 is a very dark close to neutral grey. In OKLCH its lightness is 16%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.035 away. White text reads best on it, at 19.37:1.
| Hue family | Neutrals |
| Lightness | very dark (16%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.08:1 |
| White text | 19.37:1 |
Values
| HEX | #100B19 |
| RGB | rgb(16, 11, 25) |
| HSL | hsl(261, 39%, 7%) |
| OKLCH | oklch(16.4% 0.03 299.6) |
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 #100B19 | 19.37:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #100B19 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #100B19 text on white | 19.37:1 | AAA | Lc 105.6 | Preferred for body text |
| #100B19 text on black | 1.08:1 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EBE8F0
oklch(93.6% 0.011 303.1)
-
Step 200
200
#DBD6E4
oklch(88.4% 0.02 302.2)
-
Step 300
300
#C4BCD5
oklch(81% 0.036 300.2)
-
Step 400
400
#A599BF
oklch(70.6% 0.056 299.4)
-
Step 500
500
#9080AF
oklch(63.2% 0.072 300)
-
Step 600
600
#7A699B
oklch(55.6% 0.078 299.5)
-
Step 700
700
#675784
oklch(49.1% 0.073 300.1)
-
Step 800
800
#54476B
oklch(42.6% 0.06 300.4)
-
Step 900
900
#453C57
oklch(37.7% 0.047 299.5)
-
Step 950
950 (this color)
#100B19
oklch(16.4% 0.03 299.6)
#100B19 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) | #080D1A | 0.017 |
| Deuteranopia (no green cones) | #080D19 | 0.017 |
| Tritanopia (no blue cones) | #0E0D10 | 0.023 |
| Achromatopsia (no color) | #0D0D0D | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100B19
#100B19
oklch(16.4% 0.03 299.6)
- #0D1003
#0D1003
oklch(16.5% 0.029 118.8)
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 #100B19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.035
- Rich Navy #001219 ΔE 0.038
- Rich Black #0D1B2A ΔE 0.060
- Very Dark Brown #1D0200 ΔE 0.065
- Midnight #03012D ΔE 0.067
- Dark Navy Blue #00022E ΔE 0.071
- Dark Navy #000435 ΔE 0.074
- Very Dark Blue #000133 ΔE 0.078
Use #100B19 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.