#640D0B
Closest named color: Claret (#680018). oklch(32.6% 0.12 27.9), rgb(100, 13, 11).
Aa
White text reads best on this color (13.09:1).
About this color
#640D0B is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.120 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.023 away. White text reads best on it, at 13.09:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.120) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.60:1 |
| White text | 13.09:1 |
Values
| HEX | #640D0B |
| RGB | rgb(100, 13, 11) |
| HSL | hsl(1, 80%, 22%) |
| OKLCH | oklch(32.6% 0.12 27.9) |
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 #640D0B | 13.09:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #640D0B | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #640D0B text on white | 13.09:1 | AAA | Lc 98.0 | Preferred for body text |
| #640D0B text on black | 1.60:1 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F5ABA0
oklch(80.9% 0.089 28.6)
-
Step 400
400
#ED7A6D
oklch(70.8% 0.144 27.9)
-
Step 500
500
#E35145
oklch(63.1% 0.184 28.1)
-
Step 600
600
#CF2B26
oklch(55.7% 0.2 27.9)
-
Step 700
700
#B21A18
oklch(49.1% 0.186 28)
-
Step 800
800
#911B17
oklch(42.8% 0.154 28)
-
Step 900
900 (this color)
#640D0B
oklch(32.6% 0.12 27.9)
-
Step 950
950
#451410
oklch(27.1% 0.076 27.9)
#640D0B 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) | #2A2509 | 0.130 |
| Deuteranopia (no green cones) | #3F3706 | 0.117 |
| Tritanopia (no blue cones) | #6F000E | 0.025 |
| Achromatopsia (no color) | #313131 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D0B
#640D0B
oklch(32.6% 0.12 27.9)
- #003C43
#003C43
oklch(32.6% 0.056 207.7)
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 #640D0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.023
- Reddy Brown #6E1005 ΔE 0.025
- Burgundy #610023 ΔE 0.041
- Blood #770001 ΔE 0.041
- Wine Red #7B0323 ΔE 0.059
- Maroon #800000 ΔE 0.062
- Chestnut #742802 ΔE 0.067
- Bordeaux #7B002C ΔE 0.067
Use #640D0B 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.