#100D19
Closest named color: Almost Black (#070D0D). oklch(16.9% 0.025 295.1), rgb(16, 13, 25).
Aa
White text reads best on this color (19.20:1).
About this color
#100D19 is a very dark close to neutral grey. In OKLCH its lightness is 17%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.033 away. White text reads best on it, at 19.20:1.
| Hue family | Neutrals |
| Lightness | very dark (17%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.09:1 |
| White text | 19.20:1 |
Values
| HEX | #100D19 |
| RGB | rgb(16, 13, 25) |
| HSL | hsl(255, 32%, 7%) |
| OKLCH | oklch(16.9% 0.025 295.1) |
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 #100D19 | 19.20:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #100D19 | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #100D19 text on white | 19.20:1 | AAA | Lc 105.5 | Preferred for body text |
| #100D19 text on black | 1.09:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#D9D7E3
oklch(88.4% 0.016 293.7)
-
Step 300
300
#C1BDD2
oklch(80.8% 0.03 294.5)
-
Step 400
400
#A29BBC
oklch(70.7% 0.048 294.9)
-
Step 500
500
#8C83AB
oklch(63.2% 0.06 294.9)
-
Step 600
600
#766C96
oklch(55.7% 0.065 295.1)
-
Step 700
700
#635A80
oklch(49.1% 0.061 294.9)
-
Step 800
800
#514A68
oklch(42.8% 0.05 294.9)
-
Step 900
900
#433E55
oklch(37.8% 0.039 294.4)
-
Step 950
950 (this color)
#100D19
oklch(16.9% 0.025 295.1)
#100D19 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) | #0A0F19 | 0.013 |
| Deuteranopia (no green cones) | #0A0F19 | 0.013 |
| Tritanopia (no blue cones) | #0E0F11 | 0.021 |
| Achromatopsia (no color) | #0F0F0F | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100D19
#100D19
oklch(16.9% 0.025 295.1)
- #0F1105
#0F1105
oklch(17.1% 0.025 116.2)
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 #100D19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.033
- Rich Navy #001219 ΔE 0.034
- Rich Black #0D1B2A ΔE 0.054
- Very Dark Brown #1D0200 ΔE 0.066
- Midnight #03012D ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.074
- Dark Navy #000435 ΔE 0.076
- Very Dark Blue #000133 ΔE 0.081
Use #100D19 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.