#100103
Closest named color: Very Dark Brown (#1D0200). oklch(11.6% 0.038 10.7), rgb(16, 1, 3).
Aa
White text reads best on this color (20.43:1).
About this color
#100103 is a very dark, muted red. In OKLCH its lightness is 12%, its chroma 0.038 and its hue 11°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.042 away. White text reads best on it, at 20.43:1.
| Hue family | Reds |
| Lightness | very dark (12%) |
| Chroma | muted (0.038) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.02:1 |
| White text | 20.43:1 |
Values
| HEX | #100103 |
| RGB | rgb(16, 1, 3) |
| HSL | hsl(352, 88%, 3%) |
| OKLCH | oklch(11.6% 0.038 10.7) |
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 #100103 | 20.43:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #100103 | 1.02:1 | Fails | Lc 0.0 | Not readable |
| #100103 text on white | 20.43:1 | AAA | Lc 105.9 | Preferred for body text |
| #100103 text on black | 1.02:1 | 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F2E6E8
oklch(93.5% 0.013 5.8)
-
Step 200
200
#E9D3D5
oklch(88.5% 0.025 11.3)
-
Step 300
300
#DCB5B9
oklch(80.9% 0.045 11.2)
-
Step 400
400
#C98E95
oklch(70.6% 0.072 11.2)
-
Step 500
500
#BA717C
oklch(63.1% 0.093 10.3)
-
Step 600
600
#A55965
oklch(55.6% 0.1 10.8)
-
Step 700
700
#8D4854
oklch(49% 0.094 10.1)
-
Step 800
800
#733C45
oklch(42.8% 0.077 10.5)
-
Step 900
900
#5D333A
oklch(37.6% 0.061 9.7)
-
Step 950
950 (this color)
#100103
oklch(11.6% 0.038 10.7)
#100103 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) | #030303 | 0.043 |
| Deuteranopia (no green cones) | #060603 | 0.041 |
| Tritanopia (no blue cones) | #130002 | 0.010 |
| Achromatopsia (no color) | #050505 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100103
#100103
oklch(11.6% 0.038 10.7)
- #000707
#000707
oklch(11.6% 0.02 194.8)
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 #100103, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.042
- Almost Black #070D0D ΔE 0.060
- Rich Navy #001219 ΔE 0.085
- Midnight #03012D ΔE 0.105
- Dark Navy Blue #00022E ΔE 0.110
- Very Dark Blue #000133 ΔE 0.120
- Rich Black #0D1B2A ΔE 0.120
- Dark Navy #000435 ΔE 0.121
Use #100103 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.