#66313E
Closest named color: Purple Brown (#673A3F). oklch(38.7% 0.077 5.8), rgb(102, 49, 62).
Aa
White text reads best on this color (10.12:1).
About this color
#66313E is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.077 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.024 away. White text reads best on it, at 10.12:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.07:1 |
| White text | 10.12:1 |
Values
| HEX | #66313E |
| RGB | rgb(102, 49, 62) |
| HSL | hsl(345, 35%, 30%) |
| OKLCH | oklch(38.7% 0.077 5.8) |
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 #66313E | 10.12:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #66313E | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #66313E text on white | 10.12:1 | AAA | Lc 93.2 | Preferred for body text |
| #66313E text on black | 2.07:1 | Fails | Lc -9.3 | 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
#FAF3F5
oklch(97% 0.008 357.8)
-
Step 100
100
#F5E5E8
oklch(93.5% 0.018 4.5)
-
Step 200
200
#EDD1D6
oklch(88.5% 0.032 5.6)
-
Step 300
300
#E3B2BB
oklch(81% 0.058 6.1)
-
Step 400
400
#D28898
oklch(70.7% 0.092 5.6)
-
Step 500
500
#C4697F
oklch(63.1% 0.118 5.6)
-
Step 600
600
#B04E68
oklch(55.6% 0.13 5.7)
-
Step 700
700
#973F56
oklch(49.2% 0.12 6.3)
-
Step 800
800
#7A3447
oklch(42.6% 0.099 5.2)
-
Step 900
900 (this color)
#66313E
oklch(38.7% 0.077 5.8)
-
Step 950
950
#3A1C23
oklch(27.1% 0.048 5.8)
#66313E 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) | #3A3B3E | 0.085 |
| Deuteranopia (no green cones) | #48453D | 0.077 |
| Tritanopia (no blue cones) | #6E2C36 | 0.020 |
| Achromatopsia (no color) | #424242 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66313E
#66313E
oklch(38.7% 0.077 5.8)
- #005049
#005049
oklch(38.8% 0.068 184.8)
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 #66313E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.024
- Brownish Purple #76424E ΔE 0.059
- Chestnut #742802 ΔE 0.070
- Wine Red #7B0323 ΔE 0.074
- Bordeaux #7B002C ΔE 0.074
- Merlot #730039 ΔE 0.074
- Reddy Brown #6E1005 ΔE 0.078
- Wine #80013F ΔE 0.079
Use #66313E 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.