#1D0303
Closest named color: Very Dark Brown (#1D0200). oklch(15.5% 0.05 25), rgb(29, 3, 3).
Aa
White text reads best on this color (19.68:1).
About this color
#1D0303 is a very dark, muted red. In OKLCH its lightness is 16%, its chroma 0.050 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.010 away. White text reads best on it, at 19.68:1.
| Hue family | Reds |
| Lightness | very dark (16%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.68:1 |
Values
| HEX | #1D0303 |
| RGB | rgb(29, 3, 3) |
| HSL | hsl(0, 81%, 6%) |
| OKLCH | oklch(15.5% 0.05 25) |
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 #1D0303 | 19.68:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #1D0303 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #1D0303 text on white | 19.68:1 | AAA | Lc 105.5 | Preferred for body text |
| #1D0303 text on black | 1.06:1 | 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
#FBF3F3
oklch(97% 0.009 17.3)
-
Step 100
100
#F5E6E4
oklch(93.6% 0.017 26.7)
-
Step 200
200
#EED1CE
oklch(88.4% 0.033 24.8)
-
Step 300
300
#E4B3AE
oklch(81% 0.058 25.1)
-
Step 400
400
#D58983
oklch(70.7% 0.094 24.6)
-
Step 500
500
#C86A64
oklch(63.1% 0.12 24.9)
-
Step 600
600
#B3504B
oklch(55.6% 0.13 25.1)
-
Step 700
700
#9A403C
oklch(49.1% 0.122 25.1)
-
Step 800
800
#7D3532
oklch(42.7% 0.101 24.7)
-
Step 900
900
#652F2C
oklch(37.7% 0.079 24.8)
-
Step 950
950 (this color)
#1D0303
oklch(15.5% 0.05 25)
#1D0303 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) | #090703 | 0.052 |
| Deuteranopia (no green cones) | #100D03 | 0.048 |
| Tritanopia (no blue cones) | #210003 | 0.014 |
| Achromatopsia (no color) | #0B0B0B | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D0303
#1D0303
oklch(15.5% 0.05 25)
- #000F12
#000F12
oklch(15.4% 0.027 208.8)
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 #1D0303, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.010
- Almost Black #070D0D ΔE 0.059
- Rich Navy #001219 ΔE 0.081
- Dark Maroon #3C0008 ΔE 0.081
- Deep Brown #410200 ΔE 0.094
- Rich Black #0D1B2A ΔE 0.100
- Dark Brown #341C02 ΔE 0.104
- Very Dark Purple #2A0134 ΔE 0.106
Use #1D0303 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.