#640D01
Closest named color: Reddy Brown (#6E1005). oklch(32.5% 0.121 32), rgb(100, 13, 1).
Aa
White text reads best on this color (13.12:1).
About this color
#640D01 is a dark, moderately saturated red. In OKLCH its lightness is 32%, its chroma 0.121 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.025 away. White text reads best on it, at 13.12:1.
| Hue family | Reds |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.121) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.59:1 |
| White text | 13.12:1 |
Values
| HEX | #640D01 |
| RGB | rgb(100, 13, 1) |
| HSL | hsl(7, 98%, 20%) |
| OKLCH | oklch(32.5% 0.121 32) |
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 #640D01 | 13.12:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #640D01 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #640D01 text on white | 13.12:1 | AAA | Lc 98.0 | Preferred for body text |
| #640D01 text on black | 1.59:1 | 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
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F9CEC5
oklch(88.6% 0.05 31.8)
-
Step 300
300
#F6AB9C
oklch(80.9% 0.092 31.7)
-
Step 400
400
#ED7B65
oklch(70.8% 0.145 32.2)
-
Step 500
500
#E45139
oklch(63.1% 0.187 31.8)
-
Step 600
600
#CF2C0E
oklch(55.6% 0.202 32.1)
-
Step 700
700
#B21D00
oklch(49.1% 0.186 32)
-
Step 800
800
#911B06
oklch(42.7% 0.156 32.1)
-
Step 900
900 (this color)
#640D01
oklch(32.5% 0.121 32)
-
Step 950
950
#45140C
oklch(27% 0.077 31.7)
#640D01 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) | #2A2400 | 0.131 |
| Deuteranopia (no green cones) | #3F3700 | 0.116 |
| Tritanopia (no blue cones) | #6F000B | 0.028 |
| Achromatopsia (no color) | #303030 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D01
#640D01
oklch(32.5% 0.121 32)
- #003B45
#003B45
oklch(32.4% 0.057 213.1)
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 #640D01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.025
- Claret #680018 ΔE 0.031
- Blood #770001 ΔE 0.042
- Burgundy #610023 ΔE 0.049
- Maroon #800000 ΔE 0.062
- Wine Red #7B0323 ΔE 0.064
- Chestnut #742802 ΔE 0.065
- Mahogany #4A0100 ΔE 0.069
Use #640D01 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.