#310303
Closest named color: Dark Maroon (#3C0008). oklch(20.3% 0.075 27.2), rgb(49, 3, 3).
Aa
White text reads best on this color (18.34:1).
About this color
#310303 is a very dark, moderately saturated red. In OKLCH its lightness is 20%, its chroma 0.075 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.029 away. White text reads best on it, at 18.34:1.
| Hue family | Reds |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.14:1 |
| White text | 18.34:1 |
Values
| HEX | #310303 |
| RGB | rgb(49, 3, 3) |
| HSL | hsl(0, 88%, 10%) |
| OKLCH | oklch(20.3% 0.075 27.2) |
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 #310303 | 18.34:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #310303 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #310303 text on white | 18.34:1 | AAA | Lc 104.3 | Preferred for body text |
| #310303 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F8CDC8
oklch(88.4% 0.049 25.9)
-
Step 300
300
#F5ABA2
oklch(81% 0.089 26.9)
-
Step 400
400
#EC7A6F
oklch(70.7% 0.143 27)
-
Step 500
500
#E25249
oklch(63.1% 0.181 27.1)
-
Step 600
600
#CD2D2A
oklch(55.5% 0.197 27.2)
-
Step 700
700
#B11C1D
oklch(49% 0.183 27.1)
-
Step 800
800
#901C1A
oklch(42.7% 0.152 27.2)
-
Step 900
900
#74201C
oklch(37.8% 0.118 27.1)
-
Step 950
950 (this color)
#310303
oklch(20.3% 0.075 27.2)
#310303 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) | #110E03 | 0.080 |
| Deuteranopia (no green cones) | #1C1802 | 0.074 |
| Tritanopia (no blue cones) | #370003 | 0.015 |
| Achromatopsia (no color) | #151515 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #310303
#310303
oklch(20.3% 0.075 27.2)
- #001B1F
#001B1F
oklch(20.3% 0.035 208)
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 #310303, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.029
- Deep Brown #410200 ΔE 0.041
- Very Dark Brown #1D0200 ΔE 0.056
- Mahogany #4A0100 ΔE 0.063
- Dark Brown #341C02 ΔE 0.068
- Chocolate Brown #411900 ΔE 0.073
- Dark Plum #3F012C ΔE 0.082
- Eggplant #380835 ΔE 0.093
Use #310303 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.