#1B0310
Closest named color: Very Dark Brown (#1D0200). oklch(15.6% 0.051 348.6), rgb(27, 3, 16).
Aa
White text reads best on this color (19.67:1).
About this color
#1B0310 is a very dark, muted red. In OKLCH its lightness is 16%, its chroma 0.051 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.041 away. White text reads best on it, at 19.67:1.
| Hue family | Reds |
| Lightness | very dark (16%) |
| Chroma | muted (0.051) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.67:1 |
Values
| HEX | #1B0310 |
| RGB | rgb(27, 3, 16) |
| HSL | hsl(328, 80%, 6%) |
| OKLCH | oklch(15.6% 0.051 348.6) |
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 #1B0310 | 19.67:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #1B0310 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #1B0310 text on white | 19.67:1 | AAA | Lc 105.5 | Preferred for body text |
| #1B0310 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
#FAF3F6
oklch(97% 0.008 349.2)
-
Step 100
100
#F4E5EC
oklch(93.6% 0.019 347.4)
-
Step 200
200
#EBD1DD
oklch(88.6% 0.033 348.2)
-
Step 300
300
#DFB1C7
oklch(80.8% 0.06 348.2)
-
Step 400
400
#CE88AA
oklch(70.8% 0.096 349.2)
-
Step 500
500
#BF6896
oklch(63% 0.124 348.3)
-
Step 600
600
#AA4E80
oklch(55.5% 0.134 348.6)
-
Step 700
700
#923F6C
oklch(49.2% 0.124 348.9)
-
Step 800
800
#773458
oklch(42.7% 0.104 349)
-
Step 900
900
#602E49
oklch(37.7% 0.081 348.1)
-
Step 950
950 (this color)
#1B0310
oklch(15.6% 0.051 348.6)
#1B0310 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) | #050810 | 0.057 |
| Deuteranopia (no green cones) | #0C0D0F | 0.051 |
| Tritanopia (no blue cones) | #1E0207 | 0.021 |
| Achromatopsia (no color) | #0B0B0B | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B0310
#1B0310
oklch(15.6% 0.051 348.6)
- #00110A
#00110A
oklch(15.8% 0.032 167.7)
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 #1B0310, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.041
- Almost Black #070D0D ΔE 0.060
- Rich Navy #001219 ΔE 0.075
- Very Dark Purple #2A0134 ΔE 0.081
- Midnight Purple #280137 ΔE 0.084
- Dark Maroon #3C0008 ΔE 0.088
- Rich Black #0D1B2A ΔE 0.090
- Midnight #03012D ΔE 0.093
Use #1B0310 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.