#100203
Closest named color: Very Dark Brown (#1D0200). oklch(12.1% 0.033 16.1), rgb(16, 2, 3).
Aa
White text reads best on this color (20.34:1).
About this color
#100203 is a very dark, muted red. In OKLCH its lightness is 12%, its chroma 0.033 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.039 away. White text reads best on it, at 20.34:1.
| Hue family | Reds |
| Lightness | very dark (12%) |
| Chroma | muted (0.033) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.03:1 |
| White text | 20.34:1 |
Values
| HEX | #100203 |
| RGB | rgb(16, 2, 3) |
| HSL | hsl(356, 78%, 4%) |
| OKLCH | oklch(12.1% 0.033 16.1) |
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 #100203 | 20.34:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #100203 | 1.03:1 | Fails | Lc 0.0 | Not readable |
| #100203 text on white | 20.34:1 | AAA | Lc 105.9 | Preferred for body text |
| #100203 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F1E7E7
oklch(93.6% 0.011 17.4)
-
Step 200
200
#E7D4D4
oklch(88.5% 0.021 17.6)
-
Step 300
300
#D9B7B8
oklch(80.9% 0.039 16)
-
Step 400
400
#C59193
oklch(70.7% 0.063 16.2)
-
Step 500
500
#B57579
oklch(63.1% 0.081 15.5)
-
Step 600
600
#A05D62
oklch(55.6% 0.088 15.5)
-
Step 700
700
#894C51
oklch(49% 0.083 15.3)
-
Step 800
800
#6F3F42
oklch(42.7% 0.067 16.3)
-
Step 900
900
#5A3638
oklch(37.7% 0.052 16.2)
-
Step 950
950 (this color)
#100203
oklch(12.1% 0.033 16.1)
#100203 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) | #040403 | 0.037 |
| Deuteranopia (no green cones) | #070603 | 0.033 |
| Tritanopia (no blue cones) | #130102 | 0.010 |
| Achromatopsia (no color) | #050505 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100203
#100203
oklch(12.1% 0.033 16.1)
- #000808
#000808
oklch(12.2% 0.021 194.8)
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 #100203, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.039
- Almost Black #070D0D ΔE 0.053
- Rich Navy #001219 ΔE 0.079
- Midnight #03012D ΔE 0.104
- Dark Navy Blue #00022E ΔE 0.109
- Rich Black #0D1B2A ΔE 0.114
- Very Dark Blue #000133 ΔE 0.118
- Dark Maroon #3C0008 ΔE 0.119
Use #100203 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.