#310309
Closest named color: Dark Maroon (#3C0008). oklch(20.4% 0.074 18.5), rgb(49, 3, 9).
Aa
White text reads best on this color (18.29:1).
About this color
#310309 is a very dark, moderately saturated red. In OKLCH its lightness is 20%, its chroma 0.074 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.027 away. White text reads best on it, at 18.29:1.
| Hue family | Reds |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.14:1 |
| White text | 18.29:1 |
Values
| HEX | #310309 |
| RGB | rgb(49, 3, 9) |
| HSL | hsl(352, 88%, 10%) |
| OKLCH | oklch(20.4% 0.074 18.5) |
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 #310309 | 18.29:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #310309 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #310309 text on white | 18.29:1 | AAA | Lc 104.3 | Preferred for body text |
| #310309 text on black | 1.14:1 | 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
#FDF2F2
oklch(97% 0.012 17.4)
-
Step 100
100
#FBE4E3
oklch(93.7% 0.025 20.6)
-
Step 200
200
#F8CDCD
oklch(88.5% 0.049 18.1)
-
Step 300
300
#F4AAAB
oklch(80.9% 0.088 18.3)
-
Step 400
400
#EB797E
oklch(70.7% 0.141 18.6)
-
Step 500
500
#E1505E
oklch(63.1% 0.18 18.4)
-
Step 600
600
#CC2B44
oklch(55.6% 0.195 18.6)
-
Step 700
700
#B01B36
oklch(49.1% 0.181 18.6)
-
Step 800
800
#8F1B2D
oklch(42.7% 0.15 18.6)
-
Step 900
900
#731F28
oklch(37.7% 0.117 18.9)
-
Step 950
950 (this color)
#310309
oklch(20.4% 0.074 18.5)
#310309 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) | #100E09 | 0.081 |
| Deuteranopia (no green cones) | #1C1808 | 0.073 |
| Tritanopia (no blue cones) | #370005 | 0.016 |
| Achromatopsia (no color) | #151515 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #310309
#310309
oklch(20.4% 0.074 18.5)
- #001C1D
#001C1D
oklch(20.6% 0.035 198)
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 #310309, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.027
- Deep Brown #410200 ΔE 0.043
- Very Dark Brown #1D0200 ΔE 0.059
- Mahogany #4A0100 ΔE 0.064
- Dark Plum #3F012C ΔE 0.072
- Dark Brown #341C02 ΔE 0.073
- Chocolate Brown #411900 ΔE 0.076
- Eggplant #380835 ΔE 0.083
Use #310309 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.