#640B17
Closest named color: Claret (#680018). oklch(32.6% 0.12 21.1), rgb(100, 11, 23).
Aa
White text reads best on this color (13.10:1).
About this color
#640B17 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.120 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.013 away. White text reads best on it, at 13.10:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.120) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.60:1 |
| White text | 13.10:1 |
Values
| HEX | #640B17 |
| RGB | rgb(100, 11, 23) |
| HSL | hsl(352, 80%, 22%) |
| OKLCH | oklch(32.6% 0.12 21.1) |
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 #640B17 | 13.10:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #640B17 | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #640B17 text on white | 13.10:1 | AAA | Lc 98.0 | Preferred for body text |
| #640B17 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CDCB
oklch(88.6% 0.05 21.2)
-
Step 300
300
#F6AAA7
oklch(81% 0.09 21.8)
-
Step 400
400
#ED7879
oklch(70.7% 0.145 20.9)
-
Step 500
500
#E34E56
oklch(63% 0.185 21.2)
-
Step 600
600
#CE273C
oklch(55.5% 0.2 20.9)
-
Step 700
700
#B2162E
oklch(49.1% 0.186 21.1)
-
Step 800
800
#911827
oklch(42.8% 0.155 21.1)
-
Step 900
900 (this color)
#640B17
oklch(32.6% 0.12 21.1)
-
Step 950
950
#451315
oklch(27.1% 0.077 21.6)
#640B17 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) | #282517 | 0.133 |
| Deuteranopia (no green cones) | #3E3714 | 0.120 |
| Tritanopia (no blue cones) | #6F0011 | 0.024 |
| Achromatopsia (no color) | #303030 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640B17
#640B17
oklch(32.6% 0.12 21.1)
- #003D40
#003D40
oklch(32.7% 0.056 200.3)
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 #640B17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.013
- Burgundy #610023 ΔE 0.028
- Reddy Brown #6E1005 ΔE 0.032
- Blood #770001 ΔE 0.045
- Wine Red #7B0323 ΔE 0.054
- Bordeaux #7B002C ΔE 0.059
- Merlot #730039 ΔE 0.063
- Maroon #800000 ΔE 0.064
Use #640B17 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.