#310B03
Closest named color: Dark Maroon (#3C0008). oklch(21.5% 0.064 35.8), rgb(49, 11, 3).
Aa
White text reads best on this color (17.79:1).
About this color
#310B03 is a very dark, muted red. In OKLCH its lightness is 22%, its chroma 0.064 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.035 away. White text reads best on it, at 17.79:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | muted (0.064) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.17:1 |
| White text | 17.79:1 |
Values
| HEX | #310B03 |
| RGB | rgb(49, 11, 3) |
| HSL | hsl(10, 88%, 10%) |
| OKLCH | oklch(21.5% 0.064 35.8) |
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 #310B03 | 17.79:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #310B03 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #310B03 text on white | 17.79:1 | AAA | Lc 104.2 | Preferred for body text |
| #310B03 text on black | 1.17:1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F4D0C6
oklch(88.5% 0.043 36)
-
Step 300
300
#EDB09F
oklch(80.9% 0.076 36.2)
-
Step 400
400
#E1836A
oklch(70.6% 0.122 35.8)
-
Step 500
500
#D66041
oklch(63% 0.156 35.8)
-
Step 600
600
#C2431F
oklch(55.7% 0.169 35.9)
-
Step 700
700
#A73311
oklch(49.1% 0.158 35.7)
-
Step 800
800
#882C12
oklch(42.8% 0.131 35.9)
-
Step 900
900
#6D2917
oklch(37.7% 0.102 35.8)
-
Step 950
950 (this color)
#310B03
oklch(21.5% 0.064 35.8)
#310B03 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) | #161202 | 0.066 |
| Deuteranopia (no green cones) | #1F1B02 | 0.061 |
| Tritanopia (no blue cones) | #370309 | 0.026 |
| Achromatopsia (no color) | #181818 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #310B03
#310B03
oklch(21.5% 0.064 35.8)
- #001E25
#001E25
oklch(21.6% 0.038 215.8)
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 #310B03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.035
- Deep Brown #410200 ΔE 0.039
- Dark Brown #341C02 ΔE 0.049
- Chocolate Brown #411900 ΔE 0.057
- Mahogany #4A0100 ΔE 0.059
- Very Dark Brown #1D0200 ΔE 0.065
- Dark Plum #3F012C ΔE 0.086
- Jet #212529 ΔE 0.087
Use #310B03 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.