#64273B
Closest named color: Purple Brown (#673A3F). oklch(36.7% 0.091 2.1), rgb(100, 39, 59).
Aa
White text reads best on this color (11.08:1).
About this color
#64273B is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 2°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.049 away. White text reads best on it, at 11.08:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.89:1 |
| White text | 11.08:1 |
Values
| HEX | #64273B |
| RGB | rgb(100, 39, 59) |
| HSL | hsl(340, 44%, 27%) |
| OKLCH | oklch(36.7% 0.091 2.1) |
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 #64273B | 11.08:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #64273B | 1.89:1 | Fails | Lc 8.8 | Not readable |
| #64273B text on white | 11.08:1 | AAA | Lc 95.1 | Preferred for body text |
| #64273B text on black | 1.89:1 | Fails | Lc -7.5 | 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
#FBF3F5
oklch(97.1% 0.009 0.1)
-
Step 100
100
#F6E5E9
oklch(93.7% 0.019 1.4)
-
Step 200
200
#F0CFD7
oklch(88.4% 0.038 1.6)
-
Step 300
300
#E7AFBD
oklch(80.9% 0.068 2.1)
-
Step 400
400
#D9839B
oklch(70.7% 0.109 2.2)
-
Step 500
500
#CC6183
oklch(63.1% 0.14 1.8)
-
Step 600
600
#B7456C
oklch(55.6% 0.151 2.1)
-
Step 700
700
#9D365A
oklch(49.1% 0.14 2.2)
-
Step 800
800
#802E4A
oklch(42.8% 0.116 2.2)
-
Step 900
900 (this color)
#64273B
oklch(36.7% 0.091 2.1)
-
Step 950
950
#3D1924
oklch(27% 0.058 2.4)
#64273B 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) | #32343C | 0.100 |
| Deuteranopia (no green cones) | #42403A | 0.091 |
| Tritanopia (no blue cones) | #6C212F | 0.025 |
| Achromatopsia (no color) | #3C3C3C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64273B
#64273B
oklch(36.7% 0.091 2.1)
- #004A42
#004A42
oklch(36.7% 0.066 182.7)
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 #64273B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.049
- Merlot #730039 ΔE 0.055
- Bordeaux #7B002C ΔE 0.061
- Wine Red #7B0323 ΔE 0.063
- Burgundy #610023 ΔE 0.064
- Claret #680018 ΔE 0.065
- Grape Purple #5D1451 ΔE 0.066
- Reddy Brown #6E1005 ΔE 0.069
Use #64273B 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.