#6C0303
Closest named color: Reddy Brown (#6E1005). oklch(33.6% 0.135 28.8), rgb(108, 3, 3).
Aa
White text reads best on this color (12.71:1).
About this color
#6C0303 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.135 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.015 away. White text reads best on it, at 12.71:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.135) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.65:1 |
| White text | 12.71:1 |
Values
| HEX | #6C0303 |
| RGB | rgb(108, 3, 3) |
| HSL | hsl(0, 95%, 22%) |
| OKLCH | oklch(33.6% 0.135 28.8) |
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 #6C0303 | 12.71:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #6C0303 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #6C0303 text on white | 12.71:1 | AAA | Lc 96.7 | Preferred for body text |
| #6C0303 text on black | 1.65:1 | 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 900.
-
Step 50
50
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FCCCC4
oklch(88.5% 0.056 29.2)
-
Step 300
300
#FBA89B
oklch(80.9% 0.101 29.2)
-
Step 400
400
#F57464
oklch(70.8% 0.162 29)
-
Step 500
500
#EC4437
oklch(63% 0.207 28.8)
-
Step 600
600
#D8090B
oklch(55.6% 0.225 28.8)
-
Step 700
700
#B80004
oklch(49.2% 0.201 28.8)
-
Step 800
800
#970305
oklch(42.6% 0.173 28.6)
-
Step 900
900 (this color)
#6C0303
oklch(33.6% 0.135 28.8)
-
Step 950
950
#48100B
oklch(27.1% 0.086 29)
#6C0303 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) | #2A2401 | 0.149 |
| Deuteranopia (no green cones) | #433A00 | 0.131 |
| Tritanopia (no blue cones) | #780005 | 0.027 |
| Achromatopsia (no color) | #333333 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C0303
#6C0303
oklch(33.6% 0.135 28.8)
- #003F47
#003F47
oklch(33.7% 0.058 208.9)
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 #6C0303, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.015
- Claret #680018 ΔE 0.025
- Blood #770001 ΔE 0.025
- Maroon #800000 ΔE 0.046
- Wine Red #7B0323 ΔE 0.048
- Burgundy #610023 ΔE 0.049
- Bordeaux #7B002C ΔE 0.058
- Chestnut #742802 ΔE 0.061
Use #6C0303 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.