#100304
Closest named color: Very Dark Brown (#1D0200). oklch(12.6% 0.029 14.9), rgb(16, 3, 4).
Aa
White text reads best on this color (20.25:1).
About this color
#100304 is a very dark close to neutral grey. In OKLCH its lightness is 13%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.038 away. White text reads best on it, at 20.25:1.
| Hue family | Neutrals |
| Lightness | very dark (13%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.03:1 |
| White text | 20.25:1 |
Values
| HEX | #100304 |
| RGB | rgb(16, 3, 4) |
| HSL | hsl(355, 68%, 4%) |
| OKLCH | oklch(12.6% 0.029 14.9) |
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 #100304 | 20.25:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #100304 | 1.03:1 | Fails | Lc 0.0 | Not readable |
| #100304 text on white | 20.25:1 | AAA | Lc 105.9 | Preferred for body text |
| #100304 text on black | 1.03:1 | 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#F0E7E8
oklch(93.5% 0.01 9.5)
-
Step 200
200
#E6D4D5
oklch(88.5% 0.02 13.7)
-
Step 300
300
#D6B8B9
oklch(80.9% 0.035 15.6)
-
Step 400
400
#C19395
oklch(70.7% 0.056 15.7)
-
Step 500
500
#B0787C
oklch(63.1% 0.071 14.6)
-
Step 600
600
#9B6065
oklch(55.5% 0.077 14.4)
-
Step 700
700
#844F54
oklch(49% 0.072 13.9)
-
Step 800
800
#6C4144
oklch(42.7% 0.06 15.4)
-
Step 900
900
#58373A
oklch(37.7% 0.047 13.6)
-
Step 950
950 (this color)
#100304
oklch(12.6% 0.029 14.9)
#100304 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) | #050504 | 0.032 |
| Deuteranopia (no green cones) | #080704 | 0.029 |
| Tritanopia (no blue cones) | #120203 | 0.007 |
| Achromatopsia (no color) | #060606 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100304
#100304
oklch(12.6% 0.029 14.9)
- #000909
#000909
oklch(12.7% 0.022 194.8)
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 #100304, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.038
- Almost Black #070D0D ΔE 0.047
- Rich Navy #001219 ΔE 0.073
- Midnight #03012D ΔE 0.101
- Dark Navy Blue #00022E ΔE 0.105
- Rich Black #0D1B2A ΔE 0.108
- Very Dark Blue #000133 ΔE 0.114
- Dark Navy #000435 ΔE 0.114
Use #100304 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.